The following reaction reaches equilibrium at 650oC and atmospheric pressure: N2(S) + C2H2(g) 2HCN(g) If the system initially is an equimolar mixture of nitrogen and acetylene, what is the...

Consider the steel balls of Problem 5.5, except now the air temperature increases with time as T ,(t) = 325 K + at where a = 0.1875 K/s. (a) Sketch the ban temperature versus time for 0 < t < 1 h....

Assuming the velocity field given in Prob. 2.6 pertains to an incompressible flow calculate the stream function and velocity potential. Using your results, show that lines of constant are...

The figure shows a torsion bar OA fixed at O, simply supported at A, and connected to a cantilever AB. The spring rate of the torsion bar is kT , in newton-meters per radian, and that of the...

Two stainless steel plates 10 mm thick are subjected to a contact pressure of I bar under vacuum conditions for which there is an overall temperature drop of 100C across the plates. What is the heat...

An aqueous solution of urea (MW = 60.06) freezes at 4.6C and 1 atm. Estimate the normal boiling point of the solution: then calculate the mass of urea (grams) that would have to be added to 1.00 kg...

A torsion-bar spring consists of a prismatic bar, usually of round cross section, that is twisted at one end and held fast at the other to form a stiff spring. An engineer needs a stiffer one than...

A heat engine that rejects waste heat to a sink at 530 R has a thermal efficiency of 36 percent and a second-law efficiency of 60 percent. Determine the temperature of the source that supplies heat...

Disk A rotates in a horizontal plane about a vertical axis at the constant rate of 0 =15 rad/s. Slider B has a mass of 230 g and moves in a frictionless slot cut in the disk. The slider is attached...

For the liquid storage system shown in Fig. E, it is desired to control liquid levels h1 and h2 by adjusting volumetric flow rates q1 and q2. Flow rate q6 is the major disturbance variable. The...

Atmospheric air at 25C and a velocity of 0.5 m/s flows over a 50- W incandescent bulb whose surface temperature is at 140C. The bulb may be approximated as a sphere of 50-mm diameter. What is the...

The products of combustion from a burner are routed to an industrial application through a thin-walled metallic duct of diameter D; = I m and length L = 100 In. The gas enters the duct at atmospheric...

The pitcher in a softball game throws a ball with an initial velocity v0 of 40 mi/h at an angle ? with the horizontal. If the height of the ball at point B is 2.2 ft, determine(a) The angle ? ,(b)...

Things were going smoothly at the Breaux Bridge Drug Co. pilot plant during the midnight to 8.a.m. shift until Therese Lagniappe, the reactor operator, let the run instruction sheet get too close to...

A stream of ethylene glycol vapor at its normal boiling point and 1 atm flowing at a rate of 175 kg/mm is to be condensed at constant pressure. The product stream from the condenser is liquid glycol...

The rectangular member OAB, shown in the figure, is held horizontal by the round hooked bar AC. The modulus of elasticity of both parts is 10 Mpsi. Use superposition to find the deflection at B due...

Use Castiglianos theorem to verify the maximum deflection for the uniformly loaded beam of Appendix Table A97. Neglect shear.

The center of gravity G of a 3.5-lb unbalanced tracking wheel is located at a distance r = 0.9 in. from its geometric center B. The radius of the wheel is R = 3 in. and its centroidal radius of...

Air enters the diffuser of a ramjet engine at 25 kPa, 200 K, with a velocity of 3000 km/h, and is decelerated to a negligible velocity. On the basis of an air standard analysis, the heat addition is...

Frame ABCD is supported by a ball-and-socket joint at A and by three cables. For a = 150 mm, determine the tension in each cable and the reaction at A. IN

A coal contains 73.0 wt% C, 4.7% H (not including the hydrogen in the coal moisture) 3.7% S 6.8% H 2 O, and 11.8% ash. The coal is burned at a rate of 50,000lb m /h in a power plant boiler with air...

Figure is the simplified process state diagram with running, ready, and blocked states. Modify the diagram so that it includes new states to represent when a process is swapped out. Show the...

The dynamic response of a stirred-tank bioreactor can be represented by the transfer function where C is the exit substrate concentration, mol/L and C f is the feed substrate concentration, mol/L....

Determine the force in members EF and EL of the roof truss and state if the members are in tension or compression. Units Used: kN = 103 N Given: F1 = 6kN F2 = 12kN F3 = 12kN F4 = 12kN a = 4 m b = 3 m...

An 8-kg plunger is released from rest in the position shown and is stopped by two nested springs; the constant of the outer spring is k1 = 3 kN/m and the constant of the inner spring is k2 = 10 kN/m....

Repeat Exercise 4.53 if the residence time is only sufficient to leach 80% of the carbonate.

A 2000-liter water tank can withstand pressures up to 20.0bar absolute before rupturing. At a particular time the tank contains 165.0 kg of liquid water, the fill and exit valves are closed, and the...

Morphine and morphine 3-β-D-glucuronide were separated on two different 4.6-mm diameter à 50-mm-long columns with 3-μm particles.39 Column A was C18-silica run at 1.4...

Does the reference point selected for the properties of a substance have any effect on thermodynamic analysis? Why?

Water at 50F and 50 psia is heated in a chamber by mixing it with saturated water vapor at 50 psia. If both streams enter the mixing chamber at the same mass flow rate, determine the temperature and...

A heavily insulated pistoncylinder device contains 0.05 m3 of steam at 300 kPa and 150C. Steam is now compressed in a reversible manner to a pressure of 1 MPa. Determine the work done on the steam...

Standards for firewalls may be based on their thermal response to a prescribed radiant heat flux. Consider a 0.25-m-thick concrete wall (p = 2300 kg/m 3 c = 880 J/kg. K, k = 1.4 W/m K), which is at...

The elevation of the end of the steel beam supported by a concrete floor is adjusted by means of the steel wedges E and F. The base plate CD has been welded to the lower flange of the beam, and the...

To unload a bound stack of plywood from a truck, the driver first tilts the bed of the truck and then accelerates from rest. Knowing that the coefficients of friction between the bottom sheet of...

A 120-kg satellite has a radius of gyration of 600 mm with respect to the y axis and is symmetrical with respect to the zx plane. Its orientation is changed by firing four small rockets A, B, C, and...

In a dairy operation, milk at a flow rate of 250 liter/hour and a cow-body temperature of 38.6C must be chilled to a safe-to-store temperature of 13C or less. Ground water at 10C is available at a...

A solution was prepared by mixing 25.00 mL of 0.080 0 M aniline, 25.00 mL of 0.060 0 M sulfanilic acid, and 1.00 mL of 1.23 10 -4 M HIn and then diluting to 100.0 mL. (HIn stands for protonated...

A pin fin of 10-mm diameter dissipates 30 W by forced convection to air in cross flow with a Reynolds number of 4000. If the diameter of the fin is doubled and all other conditions remain the same,...

A kettle containing 3.00 liters of water at a temperature of 18C is placed on an electric stove and begins to boil in four minutes. (a) Write an energy balance on the water, neglecting evaporation...

Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm 3 , and an atomic weight of 50.9 g/mol.

Neglecting any effects caused by volume changes, would you expect the ionic strength to (1) increase, (2) decrease, or (3) remain essentially unchanged when NaOH is added to a dilute solution of (a)...

What is the pH of a solution that is (a) Prepared by dissolving 3.30 g of (NH4)2SO4 in water, adding 125.0 mL of 0.1011 M NaOH, and diluting to 500.0 mL? (b) 0.120 M in piperidine and 0.010 M in its...

A 6-in-wide polyamide F-1 flat belt is used to connect a 2-in-diameter pulley to drive a larger pulley with an angular velocity ratio of 0.5. The center-to-center distance is 9 ft. The angular speed...

Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200 kPa with refrigerant-134a as the working fluid. The refrigerant leaves the condenser as a...

The chandelier is supported by three chains which are concurrent at point O. If the resultant force at O has magnitude FR and is directed along the negative z axis, determine the force in each chain...

Determine the force in each member of the truss and state if the members are in tension or compression. Units Used: kN = 103 N Given: P1 = 4kN P2 = 0kN a = 2 m = 15 deg P:

Two steel thin-wall tubes in torsion of equal length are to be compared. The first is of square cross section, side length b, and wall thickness t. The second is a round of diameter b and wall...

Liquid propane is commonly used as a fuel for heating homes, powering vehicles such as forklifts, and filling portable picnic tanks. Consider a propane tank that initially contains 5 L of liquid...

In a production facility, 1.2-in-thick, 2-ft = 2-ft square brass plates (r = 532.5 lbm/ft3 and cp = 0.091 Btu/lbm ¢ °F) that are initially at a uniform temperature of 75°F are heated by...

Knowing that the radius of each pulley is 200 mm and neglecting friction, determine the internal forces at point K of the frame shown. 18 m 0.2 m 0.6 m 0.8 m 0.2 m 360 N

The uranyl nitrate (UN) in 2 kg of a 20 wt% aqueous solution is to be extracted with 500 g of tributyl phosphate. Using the equilibrium data in Exercise 5.9, calculate and compare the percentage...

(a) For each of the following cases, determine what functions of time, e.g., constant, e ?8t , will appear in y(t). (Note that you do not have to find (t)1) Which y(t) are oscillatory? Which exhibit...

Heat is transferred from water to air through a brass wall (k = 54 W/(m K)). The addition of rectangular brass fins, 0.08 cm thick and 2.5 cm long, spaced 1.25 cm apart, is contemplated. Assuming a...

A pre-heater involves the use of condensing steam at 100C on the inside of a bank of tubes to heat air that enters at 1 atm and 25C. The air moves at 5 m/s in cross flow over the tubes. Each tube is...

When the feed to a distillation column contains a small amount of impurities that are much more volatile than the desired distillate, it is possible to separate the volatile impurities from the...

Figure P3.87 simulates a manifold flow, with fluid removed from a porous wall or perforated section of pipe. Assume incompressible flow with negligible wall friction and small suction Vw _V1... If...

Knowing that at the instant shown rod AB has a constant angular velocity of 15 rad/s counterclockwise, determine (a) The angular acceleration of rod DE, (b) The acceleration of point D. 4.5.- -5m la...

Suppose that a multi programmed system has a load of N processes with individual total execution times of t1, t2 tN. How would it be possible that T > t 1 + t 2 + + t N ? That is, what could cause...

The rated speed of drum B of the belt sander shown is 2400 rpm. When the power is turned off, it is observed that the sander coasts from its rated speed to rest in 10 s. Assuming uniformly...

The section of the sealed joint shown in the figure is loaded by a repeated force P = 6 kip. The members have E = 16 Mpsi. All bolts have been carefully preloaded to Fi = 25 kip each

Determine the resultant moment of the forces about point A. Solve the problem first by considering each force as a whole, and then by using the principle of moments. Units Used: kN = 103 N Given: F1...

At the instant shown during deceleration, the velocity of an automobile is 12 m/s to the right. Knowing that the velocity of the contact point A of the wheel with the ground is 1.5 m/s to the right,...

A long, cylindrical heating element of 20-mm diameter operating at 700 K in vacuum is located 40 mm from an insulated wall of low thermal conductivity (a) Assuming both the element and the wall are...

Determine the angle ? for connecting member A to the plate so that the resultant force FA and F n is directed horizontally to the right. Also, what is the magnitude of the resultant force? F=8 kN 40...

A seven-component mixture is flashed at a specified temperature and pressure.(a) Using the K-values and feed composition given below, make a plot of the Rachford-Rice flash function at intervals of ?...

Detection limit. Low concentrations of Ni2+ -EDTA near the detection limit gave the following counts in a mass spectral measurement: 175, 104, 164, 193, 131, 189, 155, 133, 151, 176. Ten measurements...

Consider a building whose annual air-conditioning load is estimated to be 120,000 kWh in an area where the unit cost of electricity is $0.10/kWh. Two air conditioners are considered for the building....

A four-cylinder spark-ignition engine has a compression ratio of 8, and each cylinder has a maximum volume of 0.6 L. At the beginning of the compression process, the air is at 98 kPa and 17C, and the...

Determine the moment of inertia for the solid steel assembly about the x axis. Steel has a specific weight st. Given: a = 2 ft b = 3 ft c = 0.5 ft d = 0.25 ft st = 490lb/ft3

Knowing that WA = 25lb and θ = 30°, determine (a) The smallest value of B W for which the system is in equilibrium, (b) The largest value of WB for which the system is in...

Irreversible first-order reaction in a continuous reactor, a well-stirred reactor of volume V is initially completely filled with a solution of solute A in a solvent S at concentration C AO . At time...

Figure P820 illustrates the connection of a cylinder head to a pressure vessel using 10 bolts and a confined-gasket seal. The effective sealing diameter is 150 mm. Other dimensions are: A = 100, B =...

An inventor claims to have developed a refrigeration system that removes heat from the closed region at -12C and transfers it to the surrounding air at 25C while maintaining a COP of 6.5. Is this...

A horizontal cylinder is separated into two compartments by an adiabatic, frictionless piston. One side contains 0.2 m3 of nitrogen and the other side contains 0.1 kg of helium, both initially at...

A 5-m-long beam is subjected to a variety of loadings. (a) Replace each loading with an equivalent force-couple system at end B of the beam. (b) Which of the loadings are equivalent? 60) N -5 m 400 N...

For many viscous materials, the viscosity ? may be defined in terms of the expression where ? and d?/dt are, respectively, the tensile stress and the strain rate. A cylindrical specimen of a...

For the brake in Prob. 161, consider the pin and actuator locations to be the same. However, instead of 120, let the friction surface of the brake shoes be 90 and centrally located. Find the maximum...

Intravenous infusions are usually driven by gravity by hanging the fluid bottle at sufficient height to counteract the blood pressure in the vein and to force the fluid into the body. The higher the...

A household refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 60 kJ/min, determine (a) The electric power consumed by the refrigerator and (b) The rate of heat...

Two steel pipes AB and BC, each having a weight per unit length of 5 lb/ft, are welded together at B and are supported by three wires. Knowing that a = 1. 25 ft, determine the tension in each wire.

In the position shown, collar B moves to the left with a constant velocity of 300 mm/s. Determine(a) The velocity of collar A,(b) The velocity of portion C of the cable,(c) The relative velocity of...

One gram-mole of methyl chloride vapor is contained in a vessel at 100C and 10atm. (a) Use the ideal gas equation of state to estimate the system volume. (b) Suppose the actual volume of the vessel...

For the process modeled by Find the four transfer functions relating the outputs (y1, y2) to the inputs (u1, u2). The u and y arc deviation variables. yi -2yi -3y2 + 2u; dt dy = 4y;- 6y2 + 2u; + 4uz...

Consider the liquid-level PI control system shown in Figure with the following parameter values: A = 3 ft2, R = 1.0 min/ft2, Kv = 0.2 cfm/psi, Km = 4 mA/ft, Kc 4, and 1 = 3 min. Suppose that the...

A blending tank that provides nearly perfect mixing is connected to a downstream unit by a Long transfer pipe. The blending tank operates dynamically like a first-order process. The mixing...

Sketch the plots described below and calculate the equations for y(x) from the given information. The plots are all straight lines, Note that the given coordinates refer to abscissa and ordinate...

A distillation column is operated under steady-state conditions with a flow rate of 9650 lb/hr of distillate product. The operator suddenly changes the reboiler steam pressure from 92 psig to 95 psig...

An experimental procedure for validating results of the foregoing problem involves preheating a copper disk to an initial elevated temperature T; and recording its temperature history T(t) as it is...

The Stillwater geothermal power plant in Nevada, which started full commercial operation in 1986, is designed to operate with seven identical units. Each of these seven units consists of a pair of...

An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100°C. Air enters the...

Consider the flat plate of Problem 3.101, but with the heat sinks at different temperatures, T(0) = To and T(L) = T L , and with the bottom surface no longer insulated. Convection heat transfer is...

The extent 10 which the tip condition affects the thermal performance of a fin depends on the fin geometry and thermal conductivity, as well as the convection coefficient. Consider an alloyed...

In the planetary gear system shown, the radius of gears A, B, C, and D is 60 mm and the radius of the outer gear E is 180 mm, knowing that gear E has an angular velocity of 120 rpm clockwise and that...

Mutual solubility data for the isooctane (1)/furfural (2) system at 25?C are [Chem. Eng. Sci., 6, 116 (1957)] Compute: (a) The distribution coefficients for isooctane and furfural (b) The relative...

Knowing that the tension in wire BD is 300 lb, determine the reaction at fixed support C for the frame shown. 180 Ib 6 in. 10 in. -20 in. 100 lb 24 in. 16 in.

A plane wall of thickness L = 0.1 m experiences uniform volumetric heating at a rate q. One surface of the wall (x = 0) is insulated, while the other surface is exposed to a fluid at Too = 20C, with...

Cooling water flows through the 25.4-mm-diameter thin-walled tubes of a steam condenser at 1 m/s, and a surface temperature of 350 K is maintained by the condensing steam. The water inlet temperature...

Consider the metallic surface of Example 12.6. Additional measurements of the spectral, hemispherical emissivity yield a spectral distribution which may be approximated as follows: (a) Determine...

An uninsulated steam pipe is used to transport high-temperature steam from one building to another. The pipe is of 0.5-m diameter, has a surface temperature of 150C, and is exposed to ambient air at...

An immersed electrical heater is used to raise the temperature of a liquid from 20?C to 60?C in 20.0 mm. The combined mass of the liquid and the container is 250 kg, and the mean heat capacity of the...