In Example 6.5, we found Ni nanopartibles of 2 nm radius would melt at 587 K, assuming
Question:
In Example 6.5, we found Ni nanopartibles of 2 nm radius would melt at 587 K, assuming the system contained pure Ni liquid. Consider now 2 nm Ni nanoparticles in equilibrium with a liquid mixture. How would the actual melting temperatature compare to the value using the assumptions in Example 6.5? Explain.
Example 6.5
Transcribed Image Text:
The field of nanotechnology is an emerging area for chemical and biological engineers. Consider nickel nanoparticles for use as a catalyst to grow carbon nanotubes. The normal melting temperature, Tm, of nickel is 1728 K. In a nanoparticle, the curved surface leads to a force acting tangentially to the surface of the particles, which changes the Gibbs energy of the solid. The magnitude of this effect is determined by the surface tension, . The differential change in Gibbs energy can be written to account for surface tension in terms of curvature, or inverse radius (1/R). In this case, the fundamental property relation given by Equation (5.9) can be modified as follows: dg, = sidT+ vdP + 2v0,d The following properties are available for Ni: surface tension of solid Ni: density of solid Ni: Enthalpy of fusion: (1) R Ahfus. Ni Ni : 1.75 = Phi = 8,900 = -17.48 [] [$] kJ mol
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 50% (4 reviews)
Answered By
Vikash Gupta
I am graduated in Physics in 2018, from KIRORIMAL COLLEGE, University of Delhi. Now I am persuing Master's degree in physics. I like to do physics problems. I have experience of 1 year in tutoring. I think Physics is the only subject where you understand things,how they are happening . In physics you learn Maths and apply it. So I would like to join your platform to solve many Physics problems.
5.00+
5+ Reviews
10+ Question Solved
Related Book For
Question Posted:
Students also viewed these Engineering questions
-
PLEASE GIVE CORRECT ANSWERS Prove that the number of comparators in any sorting network is (n log n). [4 marks] (ii) What does Part (d)(i) imply in terms of the depth of any sorting network? [1 mark]...
-
a. Example 13-1: Batch Reactor with an Exothermic Reaction Wolfram 1. Adiabatic Case: Use Wolfram to see whether you can find a trajectory that is ready to ignite and whose trajectory looks like a...
-
can someone solve this Modern workstations typically have memory systems that incorporate two or three levels of caching. Explain why they are designed like this. [4 marks] In order to investigate...
-
Determine if the following strains satisfy the compatibility equations (2.6.2): a. b. c. where A, B and C are constants. Equation 2.6.2 ex=Ay, ey = ez = 0, exy = (Ax+Bz)/2, eyz = Bxz + Cy, ezx = C.x
-
Research three articles (empirical) on Role of CIO. Read each article and prepare a summary of each article using the following format: Problem addressed in the article. Findings Implications for the...
-
Give some examples of things that could make the demand for oil more elastic. What specific policies could the government take to make demand more elastic?
-
The industry standard for balanced voltages in three phase systems is 2%. When the output data is taken on a VFD, the voltages are not easily read. What should be the current imbalance based on a...
-
Gateway Tours is choosing between two bus models. One is more expensive to purchase and maintain, but lasts much longer than the other. Its discount rate is 11%. It plans to continue with one of the...
-
How have advancements in membrane technology impacted extraction processes? Explore the use of membrane-based methods like pervaporation and membrane distillation in the extraction and purification...
-
In this problem you will compare properties of species 1 as a pure liquid at 1 atm and 300 K (System I) to species 1 in a mixture with species 2, 3, and 4 at the same pressure and temperature (System...
-
The normal melting point of pure solid 1 is Tm. Consider now that the same pure solid 1 is melting into a liquid that initially contains pure 2. How does the temperature at which 1 will melt into the...
-
Meals on Wheels Association of America (now Meals on Wheels America) is a notforprofit organization that delivers approximately one million meals to homes of older people in need across the United...
-
A satellite, observed from a ground station, is found to have an altitude of 1000km and a velocity of 5.5km/sec. It is know that the satellite is at its furthest distance from the Earth. a. b. C. d....
-
Chs 18-25 A company allocates overhead using a standard overhead rate of $4.80 per direct labor hour and 2 direct labor hours per unit. For this period, the company planned production of 10,140 units...
-
1 2 3 4 5 6 7 8 An ARM assembly code consists of following instructions: MOV R5, #10 MOV R4,0x500 L1: LDR R1, [R4] ADD R5, R5, #4 CMP R5, #18 BLT L1 ADD R2, R3, #10 CMP R2, #30 Assume that LDR...
-
Write a C++ program that save a list of 10 students ("number" (integer). "name"(string) and "grade" (float of range from 0 to 100)) in a file. The first line in the file contains the information of...
-
As you learned last week, increasing the demand for Health Care in a market should increase its price. We expect that health professionals will respond to this higher price by increasing the amount...
-
What factors would help you decide whether to write a memo, send an e-mail, try instant messaging, make a telephone call, leave a voice mail message, or deliver a message in person?
-
The overall reaction and equilibrium constant value for a hydrogenoxygen fuel cell at 298 K is 2H 2 (g) + O 2 (g) 2H 2 O(l) K = 1.28 10 83 a. Calculate E cell and G 8 at 298 K for the fuel cell...
-
Discuss the limitations of the expressions qR = kT/heB, qY = kT/hev and qE =gE
-
Explain the origin of residual entropy.
-
One of the excited states of the C2 molecule has the valence electron configuration 12g 1 2u 13u 11g. Give the multiplicity and parity of the term.
-
What information from the banking and insurance department on a producer is available to the public? What represents a reduced paid-up non-forfeiture option? A group life face amount is sometimes...
-
The one-year spot rate is 2% and the one-year forward yields are as follows for the next 10 years: 3.50%, 5.50%, 7%, 8%, 6.50%, 5%, 4.50%, 3%, 2%, 2.50%. Since investors prefer to hold short-term...
-
Problem 1.1 When pricing an American option, the dynamic programming principle states that (with time-discretized decision-making) V-At = max{P(X-At), eAtEtat [V]}, where P(X) denotes the payoff of...
Study smarter with the SolutionInn App