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Chem 127
Prof. Tauber-UCSD
Homework 4
Winter 2014
Chem 127 Physical Chemistry: Thermodynamics, Winter 2014
Homework #4
This problem set will not be submitted for a grade.
Unless specified otherwise, problems are from Physical Chemistry (5th Edition) 2014
delta (H)= Cp*delta(T) = 0 for similar reason as
delta (U)= Cv*delta(T) = 0
The process is isothermal expansion of ideal gas.
(as corrected and explained in class)
concentration
specific heat
Chapter 1: Fundamental Concepts of Thermodynamics
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q1.1) The location of the boundary between the system and the surroundings is a cho
Chem 127 Final 3/17/09 Prof. M. Tauber
Name:_ Student ID #_ Your TA is (circle one) Chen Levi
Partial credit may be given where we can follow a correct train of thought, even if the final answer may be incorrect. Each problem is worth approximately the sa
Chapter 15: Statistical Thermodynamics
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q15.1) What is the relationship between ensemble energy and the thermodynamic
concept of inter
Questions on Concepts Q10.1) Tabulated values of standard entropies of some aqueous ionic species are
negative. Why is this statement consistent with the third law of thermodynamics? This is possible due to the choice of standard state as S of ( H + ,aq )
Questions on Concepts Q5.1) Classify the following processes as spontaneous or not spontaneous and explain
your answer. a) The reversible isothermal expansion of an ideal gas. b) The vaporization of superheated water at 102C and 1 bar. c) The constant pre
Questions on Concepts Q4.1) Under what conditions are H and U for a reaction involving gases and/or
liquids or solids identical? H = U + (PV). H U for reactions involving only liquids or solids because, to a good approximation, the volume does not change
Chapter 14: Ensemble and Molecular Partition Functions
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q14.1) What is the canonical ensemble? What properties are held constant in th
Chapter 12: Probability
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q12.1) What is the difference between a configuration and a permutation?
A configuration is an unordered arra
Chapter 18: Elementary Chemical Kinetics
Questions on Concepts Q18.1) Why is the stoichiometry of a reaction generally not sufficient to determine
reaction order? The order of a rate equation for a chemical reaction indicates the concentration dependence
Chapter 17: Transport Phenomena
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q17.1) What is the general relationship between the spatial gradient in a system
property and the flu
Thermo Chapter 8 Questions on Concepts Q8.1) At a given temperature, a liquid can coexist with its gas at a single value of the
pressure. However, you can sense the presence of H2O(g) above the surface of a lake by the humidity, and it is still there if t
Chapter 13: The Boltzmann Distribution Problem numbers in italics indicate that the solution is included in the Students Solutions Manual.
Questions on Concepts Q13.1) What is the difference between a configuration and a microstate?
A configuration is a g
Chem 127
Prof. Tauber-UCSD
Homework 4
Winter 2014
Chem 127 Physical Chemistry: Thermodynamics, Winter 2014
Homework #4
This problem set will not be submitted for a grade.
Unless specified otherwise, problems are from Physical Chemistry (5th Edition) 2014
Chapter 16: Kinetic Theory of Gases
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q16.1) Why is probability used to describe the velocity and speed of gas molecules?
Velocity is a
Questions on Concepts Q11.1) What is the difference in the chemical potential and the electrochemical potential for an ion and for a neutral species in solution? Under what conditions is the electrochemical potential equal to the chemical potential for an
Questions on Concepts Q9.1) Show using the differential form of G that if Gmixing = nRT xi ln xi , then
i
H mixing = Vmixing = 0 .
Gmixing = nRT xi ln xi
i
Gmixing Smixing = = nR xi ln xi and i T P Gmixing Vmixing = =0 P T ,n1 ,n2 H mixing = Gmixing + T