Chem. 113A Homework Entropy Calculations & Solutions
1. 1.75 moles of an ideal gas with CV,m = 3/2R is transformed from an initial state T = 750 K and
P = 1.75 bar to a final state T = 350 K and P = 5.25 bar. Calculate U, H, and S for this
process.
2. The

Chem 113A Homework #5
Due: Tues. 11/12/13
1. An equation similar to the Gibbs-Duhem Equation can be derived for the partial molar
volume of a 2-component mixture and is given by:
, + , = 0
where the total molar volume is,
= , + ,
( 1)
( 2)
a) Use equati

Chem 113A Homework #7
Due: Thurs. 12/5/13
1. The escape velocity from the Earths surface is given by vE = (2gR)1/2 where g is
gravitational acceleration (9.80 m s2) and R is the radius of the Earth (6.37 106 m).
a) At what temperature will mp for N2 be eq

Chem 113A Homework #4
Due: Thurs. 11/13/14
1. Assume that a sealed vessel at constant pressure of 1 bar initially contains 2.00 mol of
. The system is allowed to equilibrate with respect to the reaction
. The number of moles of
and
at equilibrium is
and ,

Chem 113A Homework #6
Due: Tues. 11/19/13
1. Consider the Daniell cell, for which the overall cell reaction is () + ()
() + (). The concentrations of CuSO4 and ZnSO4 are 2.50 and 1.10 10-3 m,
respectively.
b) Calculate for each of the halfcell solutions

Chem 113A Homework #4
Due: Tues. 11/5/13
1. Show that
=
1
Solve the differential equation above by integration from T1 to T2 to obtain an expression that
would allow you to relate at the two temperatures. This is similar to what was done in
lecture f

Chem 113A Homework #2
Due: Tues. 10/21/14
1. 1 mol of an ideal gas with
initially at 298 K and
undergoes a
reversible adiabatic compression. At the end of the process, the pressure is
.
Calculate the final temperature of the gas. Calculate
and
for this pr

Chem 113A Homework #2
Due: Tues. 10/15/13
1. Calculate w for the adiabatic expansion of 1 mol of an ideal gas at an initial pressure of 2.00 bar from
an initial temperature of 450 K to a final temperature of 300 K. Write an expression for the work
done in

Chem 113A Homework #3
Due: Tues. 11/4/14
1. Many biological macromolecules undergo a transition called denaturation. Denaturation is a
process whereby a structured, biologically active molecule, called a native form, unfolds or
becomes unstructured and bi

Chem 113A Homework #3
Due: Tues. 10/22/13
1. 1.75 moles of an ideal gas with CV,m = 3/2R is transformed from an initial state T = 750 K and
P = 1.75 bar to a final state T = 350 K and P = 5.25 bar. Calculate U, H, and S for this
process.
2. The molar heat

Chem 113A Homework #1
Due: Tues. 10/8/13
1. The total pressure of a mixture of oxygen and hydrogen is 1.00 atm. The mixture is ignited and the
water is removed. The remaining gas is pure hydrogen and exerts a pressure of 0.400 atm when
measured at the sam

Chem 113A Homework #1
Due: Tues. 10/14/14
1. A sample of propane (C3H8) placed in a closed vessel together with an amount of O2 that is 3.00 times
the amount needed to completely oxidize the propane to CO2 and H2O at constant temperature.
Calculate the mo

Section 3 Problems
Muliple Choice
1. Experiments on denaturation and renaturation after the reduction and reoxidation of
the SS bonds in the enzyme ribonuclease (RNase) have shown that:
A) folding of denatured RNase into the native, active conformation, r