All Matches

Solution Library

Expert Answer

Textbooks

Search Textbook questions, tutors and Books

Oops, something went wrong!

Change your search query and then try again

Result Not Found

Books FREE
Tutors
Study Help
Ask a Question

Search
Sign In
Register

study help
engineering
chemical engineering

Questions and Answers of Chemical Engineering

Peak areas and relative detector responses are to be used to determine the concentration of the five species in a sample. The area normalization method described in Problem 32-20 is to be used. The
Describe a chromatogram and explain what type of information it contains.
Describe the physical differences between capillary and packed columns. What are the advantages and disadvantages of each?
What variables must be controlled if satisfactory quantitative data are to be obtained from chromatograms?
Although temperature does not have nearly the effect on HPLC separations that it has on GC separations, it nonetheless can play an important role. Discuss how and why temperature might or might not
Define (a) Isocratic elution. (b) Normal-phase packing. (c) Bonded-phase packing (d) Ion-pair chromatography. (e) Gel filtration.
Describe the fundamental difference between adsorption and partition chromatography.
Describe the difference between gel-filtration and gelpermeation chromatography.
What is the major difference between isocratic elution and gradient elution? For what types of compounds are these two elution methods most suited?
List the types of substances to which each of the following chromatographic methods is most applicable: (a) Gas-liquid. (b) Ion. (c) Gel permeation. (d) Chiral.
Describe the differences between single-column and suppressor-column ion chromatography.
List the types of substances to which each of the following separation methods is most applicable:(a) Supercritical fluid chromatography.(b) Capillary zone electrophoresis.(c) Flow FFF.
What is electroosmotic flow? Why does it occur?
What is the principle of separation by capillary zone electrophoresis?
The cationic analyte of Problem 34-14 was separated by capillary zone electrophoresis in a 50-cm capillary at 20 kV. Under the separation conditions, the electroosmotic flow rate was 0.65 mm s21
Define: (a) Supercritical fluid. (b) Two-dimensional thin-layer chromatography. (c) Critical micelle concentration.
What properties of a supercritical fluid are important in chromatography?
How do instruments for supercritical fluid chromatography differ from those for (a) HPLC (b) GC?
For supercritical carbon dioxide, predict the effect that the following changes will have on the elution time in an SFC experiment. (a) Increase the flow rate (at constant temperature and
The first accurate measurements of the properties of high-pressure gases were made by E. H. Amagat in France between 1869 and 1893. Before developing the dead-weight gauge, he winked in a mine shaft
An instrument to measure the acceleration of gravity on Mars is constructed of a spring from which in suspended a mass of 0.40 kg. At a place on earth w here the local acceleration of grant) is 9.81
The variation of fluid pressure with height is described by the differential equation:Here, ( is specific density and g is the kxcal acceleration of gravity. For an ideal gas ( = MP/RT. where M is
A group of engineers has landed on the moon, and they wish to determine the mass of some rocks. They have a spring scale calibrated to read pounds mass at a location where the acceleration of gravity
A 70-wan outdoor security light hums, on average. 10 hours a day, A new- bulb costs $5.00. and the lifetime is about 1.000 hours. If electricity costs $0.10 per kW-hour, what is the yearly price of
A gas is confined in a 1,254(ft)-diameter cylinder by a piston, on which rests a weight. The mass of the piston and weight together is 250(Ibm). The local acceleration of gravity is 32.169(ft)(s)-2
A gas is confined in a 0.47-m-diameter cylinder by a piston, on which rests a w eight. The mass of the piston and weight together is 150 kg. The local acceleration of gravity is 9.813 ms-2, and
An automobile having a mass of 1.250 kg is traveling at 40 m s-1. What is its kinetic energy in kJ? HUM much work must be done to bring it to a slop?
The turbines in a hydroelectric plant are fed by water tailing from a 50-m height. Assuming efficiency for conversion of potential to electrical energy, and 89c loss of the resulting power in
Energy costs vary greatly with energy source: coal @ $25,00/ton. gasoline @ a pomp price of $2.00/gal, and electricity @ $0. 1000/k Whr. Conventional practice is to put these on a common basis by
A laboratory reports the following vapor-pressure (Psat) data for a particular organic chemical:Correlate the data by fitting them to the Antoine equation: That is, find numerical values of
(a) In summer 1970, the pump price of gasoline was about $0.35(gal)-1. Between 1970 and 2000, the average rate of inflation was about per year. What might be the expected pump price in summer 2000?
At what absolute temperature do the Celsius and Fahrenheit temperature scales give the same numerical value? What is the value?
Pressures up to 3.000 bar are measured with a dead-weight gauge. The piston diameter is 4 mm What is the approximate mass in kg of the weights required?
Pressures up to 3.000fatmj are measured with a dead-weight gauge The piston diameter is 0.l7(in). What is the approximate mass in (lbm) of the weights required?
The reading on a mercury manometer at 25 C (open to the atmosphere at one end) is 56.38 cm. The local acceleration of gravity is 9.832 ms-2. Atmospheric pressure is 101.78 kPa What is the absolute
The reading on u mercury manometer at 70(oF) (open to the atmosphere at one end) is 25.62(in). The local acceleration of gravity is 32-243(ft)(s)-2. Atmospheric pressure is 29.86(in Hg). What is (he
A nonconducting container tilled with 25 kg of water at 20 C is fitted with a stirrer, which is made to turn by gravity acting on a weight of mass 35 kg. The weight falls slowly through a distance of
A tank containing 20 kg of water at 20oC is fitted with a stirrer (hat delivers work to the water at the rate of 0.25 kW. How long does it take for the temperature of the water to rise to 30oC if no
Heat in the amount of 7.5 kJ is added to a closed system while its internal energy decreases by 12 kJ. How much energy is transferred as work? For a process causing the same change of state but for
A steel casting weighing 2 kg has an initial temperature of 500oC; 40 kg of water initially at 25oC is contained in a perfectly insulated steel tank weighing 5 kg. The casting is immersed in the
One kg of liquid water at 25oC: (a) Experiences a temperature increase of 1 K. What is ∆U'. in kJ? (b) Experience a change in elevation ∆Z. The change in potential energy ∆EP is the same as
A hydroturbine operates with a head of 50 m of water. Inlet and outlet conduits are 2 m in diameter. Estimate the mechanical power developed by the turbine for an outlet velocity of 5 m s-1.
Liquid water at 180oC' and 1.002.7 kPa has an internal energy ton an arbitrary scale) of 762.0 kJ kg-1 and a specific volume of 1.128 cm3 g-1. (a) What is its enthalpy? (b) The water is brought to
Rework Prob. 2.1 for an insulated container that changes in temperature along with the water and has a heat capacity equivalent to 5 kg of water. Work the problem with: The water and container as the
An incompressible (( = constant) liquid flows steadily through a conduit of circular cross-section and increasing diameter At location l. the diameter is 2.5 cm and the velocity is 2 m $-1; at
A stream of warm water is produced in a steady-flow mixing process by combining 1.0 kg s-1 of cool water at 25oC with 0.8 kg s-1 of hot water at 75oC. During mixing, heat is lost to the surroundings
Water at 28oC flows in a straight horizontal pipe in which there is no exchange of either heat or work with the surroundings. Its velocity is 14 m s-1 in a pipe with an internal diameter of 2.5 cm
Fifty (50) kmol per hour of air is compressed from P1 = 1.2 bar to P2 = 6.0 bar in a steady-flow compressor. Delivered mechanical power is 98.8 kW, Temperatures and velocities are:Estimate the rate
Nitrogen flows at stead)' state through a horizontal, insulated pipe with inside diameter of 1.5in). A pressure drop results from flow through a partially opened valve. Just upstream from the valve
Water flows through a horizontal coil heated from the outside by high-temperature flue gases. As it passes through the coil the water changes stale from liquid at 200 kPa and 80oC to vapor at 100 kPa
Steam Sows at steady stale through a converging, insulated nozzle, 25 cm long and with an inlet diameter of 5 cm. At (he nozzle entrance (state 1). the temperature and pressure are 325oC and 700 kPa,
In the following take CV = 20.8 and CP = 29.1 J mol-1 oC-1 for nitrogen gas: (a) Three moles of nitrogen at 30oC contained in a rigid vessel, is heated to 250oC. How much heal is required if the
In the following lake CV = 5 and CP = 7(Btu)(Jb mole)-1(oF)-1 for nitrogen gas: (a) Three pound moles of nitrogen at 70(oF) contained in a rigid vessel, is heated to 350(oF). How much heal is
Steam at 200(psia) and 600(oF) [state 1] enters a turbine through a 3-inch-diaroctcr pipe with a velocity of 10(ft)(s)-1. The exhaust from the turbine is carried through a 10-inch-diameter pipe and
Carbon dioxide gas enters a water-coded compressor at conditions P1 = 15(psia) and T1 = 50(oF). and is discharged at condition P2 = 520(psia) and T2 = 200(oF). The entering CO2 flows through a
One kilogram of air is heated reversibly at constant pressure from an initial state of 300 K and I bar until its volume triples. Calculate W. Q. ∆U, and ∆H for the process. Assume for air that
The conditions of a gas change in a steady-flow process from 20oC and 1.000 kPa to 60oC and 100 kPa. Devise a reversible nonflow process (any number of steps) for accomplishing this change of state,
The mechanical-energy balance provides a basis for estimating pressure drop owing to friction in fluid flow. For steady flow of an incompressible fluid in a horizontal pipe of constant
An electric motor under steady load draw s 9.7 amperes at 110 volts, delivering 1.25(hp) of mechanical energy, what is the rate of heat transfer from the motor, in kW?
Ethylene enters a turbine at 10 bar and 450 K. and exhausts at l(atm) and 325 K. For m = 4.5 kg s-l, determine the cost C of the turbine. Slate any assumptions you make. Data: H1 = 761.1 H2 = 536.9
One mole of gas in a closed system undergoes a four-step thermodynamic cycle. Use the data given in the following table to determine numerical values fur the missing quantities, i.e., "fill in the
Express the volume expansivity and the isothermal compressibility as functions of density p and its partial derivatives. For water at 50(C and 1 bar, K = 44.18 ( 10-6 bar-1. To what pressure must
An ideal gas, CP = {5f2) R and CV = (3/2) R, is changed from P = 1 bar and v11 = 12 m3 to P2 = 12 bar and v12 = 1 m3 by the following mechanically reversible processes: (a) Isothermal compression (b)
A rigid, nonconducting tank with a volume of 4 m3 is divided into two unequal parts by a thin membrane. One side of the membrane, representing 1/3 of the tank, contains nitrogen gas at 6 bar and
An ideal gas, initially at 30(C and 100 kPa, undergoes the following cyclic processes in a dosed system; (a) In mechanically reversible processes, it is first compressed adiabatically to 500 kPa.
One cubic meter of an ideal gas at 600 K and 1,000 kPa expands to five times its initial volume as follows; (a) By a mechanically reversible, isothermal process. (b) By a mechanically reversible,
One mole of air, initially at 150(C and 8 bar, undergoes the following mechanically reversible changes. It expands isothermally to a pressure such that when it is cooled at constant volume to 50(C
An ideal gas flows through a horizontal tube at steady state. No heat is added and no shaft work is done. The cross-sectional area of the tube changes with length, and this causes the velocity to
One mole of an ideal gas, initially at 30(C and 1 bar, is changed to I30(C and 10 bar by three different mechanically reversible processes: • The gas is first heated at constant volume until its
One mole of an ideal gas, initially at 30(C and 1 bar, undergoes the following mechanically reversible changes. It is compressed isothermally to a point such that when it is heated at constant volume
A process consists of two steps: (1) One mole of air at T = 800 K and P = 4 bar is cooled at constant volume to T = 350 K. (21 The air is then healed at constant pressure until its temperature
€¢ (P/P1 = -0.0639.
A closed, nonconducting, horizontal cylinder is fitted with a nonconducting, friction* less, flouting piston which divides the cylinder into Sections A and B. The two sections contain equal masses of
For methyl chloride at 100(C the second and third virial coefficients are:Calculate the work of mechanically reversible, isothermal compression of 1 mol of methyl chloride from 1 bar to 55 bar at
Calculate Z and V for ethylene at 25(C and 12 bar by the following equations:(a) The truncated virial equation [Eq. (3.401] with the following experimental values of virial coefficients:(b) The
Calculate Z and V for ethane at 50(C and 15 bar by the following equations:(a) The truncated virial equation [Eq. (3.401] with the following experimental values of virial coefficients:(b) The
Calculate Z and V' for sulfur hexafluoride al 75(C and 15 bar by die following equation:(a) The truncated virial equation [Eq. (3.40)] with the following experimental values of virial
Determine Z and V for steam at 250 C and 1.800 kPa by the following:(a) The truncated virial equation [Eq. (3.40)] with the following experimental values of virial coefficients:(b) The truncated
Equation (3.12) when truacaied to four terms accurately represents the volumetric data for methane gas at 0 C with:(a) Use these data to prepare a plot of Z vs. P for methane at 0(C from 0 to 200
Calculate the molar volume of saturated liquid and the molar volume of saturated vapor by the Redlich/Kwong equation for one of the following and compare results with values found by suitable
Use the Souve/Redlieh/Kwong equation to calculate the molar volumes of saturated liquid and saturated vapor for the substance and conditions given by one of the ports of Pb. 3.38 and compare results
For liquid water the isothermal compressibility is given by;where r and b are functions of temperature only. If 1 kg of water is compressed isothermally and reversibly from I to 500 bar at 60(C. how
Use the Peng/Robinson equation to calculate the molar volumes of saturated liquid and saturated vapor for the substance and conditions given by one of the parts of Ph. 3 38 and compare results with
Estimate the following; (a) The volume occupied by 18 kg of ethylene at 55(C and 35 bar. (b) The mass of ethylene contained in a 0.25-m3 cylinder at 50(C and 115 bar.
The vapor-phase molar volume of a particular compound is reported as 23,000 cm3 mol-1 at 300 K and 1 bar. No other data are available. Without assuming ideal-gas behavior, determine a reasonable
To a good approximation, w hat is the molar volume of ethanol vapor at 480(C and 6,000 kPa? How does this result compare with the ideal-gas value?
A 0.35-m3 vessel is used to store liquid propane at its vapor pressure. Safety considerations dictate that at a temperature of 320 K the liquid must occupy no more than 80% of the total volume of the
A 30-m3 tank contains 14 m3 of liquid n-butane in equilibrium with its vapor at 25(C. Estimate the mass of n-butanc vapor in the tank. The vapor pressure of n-butane at the given temperature is 2.43
To what pressure does one fill a 0.15-m3 vessel at 25(C in order to store 40 kg of ethylene in it?
If 15 kg of H20 in a 0.4-m3 container is heated to 400(C. what pressure is developed?
A 0.35-m3 vessel holds ethane vapor at 25(C and 2,200 kPa. If it is heated to 220(C. what pressure is developed?
Calculate the reversible work done in compressing 1(ft)3 of mercury at a constant temperature of 32((F) from I(atm) to 3-00CKaim), The isothermal compressibility of mercury at 32((F) is: K/(atm)-1 =
What is the pressure in a 0.5-m3 vessel when it is charged with 10 kg of carbon dioxide at 30(C?
A rigid vessel, titled to one-half its volume with liquid nitrogen at its normal boiling point, is allowed to warm to 25(C. What pressure is developed'.' The molar volume of liquid nitrogen at its
The specific volume of isobutane liquid at 300 K and 4 bar is 1.824 cm3, g-1. Estimate the specific volume at 415 K and 75 bar.
The density of liquid n-pentane is 0.630 g cm-3 at 18(C and l bar. Estimate its density at 140(C and 120 bar.
Estimate the density of liquid ethanol at 180(C and 200 bar.
Estimate the volume change of vaporization for ammonia at 20(C. At this temperature the vapor pressure of ammonia is 857 kPa.
If l40(ft)3 of methane gas at 60((F) and l(atm) is equivalent to l(gal) of gasoline as fuel for an automobile engine, what would be the volume of the tank required to hold methane at 3,000(psia) and
Determine a good estimate for the compressibility factor Z of saturated hydrogen vapor at 25 K and 3-213 bar. For companion, an experimental value is Z = 0.7757.

Showing 6200 - 6300 of 6781

First
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68

Get In Touch

About Us
Contact Us
Career
Jobs
FAQ
Campus Ambassador

Company Info

Security
Copyrights
Privacy Policy
Terms & Condition
SolutionInn Fee
Scholarship

Services

Sitemap
Fun
Definitions
Become Tutor
Study Help Categories
Recent Questions
Expert Questions

Copyright © 2024 SolutionInn All Rights Reserved.

Get the SolutionInn - Study Help App