MSE 260 Solution Set 2; Entropy, Second law.
1. 3 moles of an ideal monatomic gas are contained in a cylinder at 5 atm and T = 400K. Calculate the change in
the entropy of the gas if this initial state is subjected to each of the following changes (i.e. s
MSE 260 Problem Set 5. DUE: Before Spring Break
(i.e. before the end of the day Fri. March 6)
Gas Reaction equilibria, Ellingham diagrams; intro to solutions.
1. A gas mixture of 50% CO, 25% CO2 and 25% H2 (by volume) is fed into a
furnace at 900C. Determ
MSE 260, Solution Set 4. One component phase equilibrium
1. Calculate the approximate pressure required to distill mercury at 100C.
Data: lnpHg(l) = -7611/T - 0.795lnT + 17.168 atm.
2. CaF2 can exist in two solid forms, and . Using the vapor pressure - te
MSE 260 Problem Set 5. Solutions
Gas Reaction equilibria, Ellingham diagrams; intro to solutions.
1. A gas mixture of 50% CO, 25% CO2 and 25% H2 (by volume) is fed into a furnace at 900C.
Determine the composition of the equilibrium CO - CO2 - H2 - H2O ga
MSE 260 Solution Set 7.
1. A solid solution of NiO and MgO with XMgO = 0.4, is heated and equilibrated at 2500K.
(a) Calculate the compositions and the relative amounts of all phases present at 2500K; you
may assume that both the solid and liquid solution
1
MSE 260 PROBLEM SET 1 Solution Set
1.
An ideal gas at 400K has a volume of 10 liters at a pressure of 20 atm. Calculate: (1) the final volume of the
system, (2) the work done by the system, (3) the heat entering or leaving the system, (4) the change in
MSE 260. 1st Exam 2015: Solutions
1. (18 points)
5 moles of an ideal gas at 27C and 12 atm. undergo the following two-stage isothermal expansion: the
external confining pressure is first released to 5 atm and then
MSE 260 Problem Set 8, Solutions.
Eutectics, Peritectics, Phase Diagrams
1. Two metals A and B show no solubility in the solid state, however mixing in the liquid is ideal. The melting
point of pure A is 1227oC, pure B melts at 1027oC.
The lowest temperat
MSE 260. 1st Exam2014: Solutions/ point assignments.
1. (24 points)
3 moles of an ideal gas at 300K and 2 atm undergo the following cycle:
a. An isobaric heat to 400K
b. A sudden release of the external pressure to 1 atm at constant T
c. An isochoric cool
MSE 260, Spring 2015 Problem Set 2 Due: Wednesday 2/4/15
Entropy, Second law.
1. 3 moles of an ideal monatomic gas are contained in a cylinder at 5 atm and T = 400K.
Calculate the change in the entropy of the gas if this initial state is subjected to each
MSE 260 Problem Set 9 (last one of the semester!). Due: beginning of class Wednesday 4/29/15.
Crystallization path in a complex binaries; nanoscale materials.
1. Describe the crystallization paths of compositions #1 and #2 on the enclosed phase diagrams
(
1
MSE 260 PROBLEM SET 1 (Due, at class: Monday January 26, 2015)
FIRST LAW.
R = 8.314 joules/deg.mol, = 0.082 L.atm/deg.mol
1. An ideal gas at 400K has a volume of 10 liters at a pressure of 20 atm.
Calculate: (1) the final volume of the system, (2) the w
MSE 260, Problem Set 4. Due: 2/18/15 (before class)
This is the last homework before the 1st exam to be held Mon. 2/23/15
One component phase equilibrium
1. Calculate the approximate pressure required to distill mercury at 100C.
Data: lnpHg(l) = -7611/T -
MSE 260. 2nd Mid-Semester Examination. April 9, 2014
Time allowed: 1hr. 30 mins
R = 8.314 J/deg.mol = 0.082 L.atm/deg.mol. For quadratic function x = cfw_-b(b2 4ac)/2a
Note: when data is provided for a
MSE 260 Problem Set 7. 3/25/15 due 4/1/15
Ideal Solid-liquid equilibrium; last problem set before Exam 2 (to be held Wed. 4/8)
1. A solid solution of NiO and MgO with XMgO = 0.4, is heated and equilibrated at 2500K.
(a) Calculate the compositions and the
MSE 260 Problem Set 6. 3/18/15: DUE 3/25/15
Solution Thermodynamics
1. (a) Calculate the free energy of mixing of the following assuming they form
ideal solutions at 800C.
(i)
1 mole of Cu with 1 mole of Ni
(ii)
2 moles of Na2SO4 with 1 mole of K2SO4
(iii
MSE 260 Problem Set 8; 4/13/15: due Monday 4/20/15
Eutectics, Peritectics, Phase Diagrams
1. Two metals A and B show no solubility in the solid state, however mixing in the liquid is
ideal. The melting point of pure A is 1227oC, pure B melts at 1027oC.
Th
MSE 260 Solution Set 6.
Solution Thermodynamics
1. (a) Calculate the free energy of mixing of the following ideal solutions at 800C.
(i) 1 mole of Cu with 1 mole of Ni
2 moles total of solution, n=2; Gmix = 2RT(0.5ln0.5 + 0.5ln0.5) = - 12367 J
(ii) 2 mole
MSE 260. 2nd Mid-Semester Examination. Solutions
1.
(30 points)
Gold (Au) can form two oxides, Au2O3 and Au2O; data for their free energy of formation is
provided below.
4 moles of solid Au2O are introduced into a 30 liter evacuated sealed chamber maintai
MSE 260. Solutions 2nd Exam, 2014.
1. (22 points)
Consider the following chemical equilibrium: PCl5(g) = PCl3(g) + Cl2(g)
At a certain temperature and volume this reaction comes to equilibrium and the
MSE 260, Problem Set 3. Due Wed. 2/11/15
3rd law, Free energies, heat capacities, manipulation of thermochemical data.
1.
2 moles of Argon at T=298K and P = 1atm are heated and compressed against a constant
external pressure of 10atm to a final T = 596K a
MSE 260, Solution Set 3.
Free energies, heat capacities, manipulation of thermochemical data.
1.
2 moles of Argon at T=298K and P = 1atm are heated and compressed against a constant
external pressure of 10atm to a final T = 596K and a final pressure = 10a
MSE 260. 1st Mid-Semester Exam; March 3, 2014.
Time allowed: 1hr 30 minutes. R = 8314 J/deg.mol = 0082 L.atm/deg.mol
There are four questions: if you run short of time outline your solution. Data is
provided in each question; you may, or may not, need all