Homework 2: Due at the beginning of class 02/19/10
Problems 1. You have one mole of monatomic ideal gas in a vertical cylinder with a piston of mass m1. The piston has a unit area (area = 1), so the pressure on the gas by the piston is m1 g (i.e. P1 = m1
Homework 5: Due by April 16 before class
Problem 1. The vapor pressure of liquid naphthalene is 1.3 kPa at 359K and 5.3 kPa at 392.5K. Assume that the naphthalene gas is an ideal gas, Vg > Vl (V is the molar volume) and Hvap is temperature and pressure in
Note 5. Equilibrium I: Free Energy
5.1 Helmholtz free energy
5.1.1 Derivation In the previous section, I alluded to a new state function which will help us sort out the total entropy change. This new state function is called the free energy. When we creat
Note 6. Equilibrium II: Applications of free energy concepts
6.1 Phase Diagram: Clapeyron equation
We've talked about phase equilibrium in a couple of different ways. The Clapeyron equation connects P, V, T and H in a new way, which is often useful for th
Note 4. Entropy II: Molecular basis of Entropy
4.1 The molecular basis of Entropy
We have discussed some mathematical aspects of entropy, but without a microscopic interpretation, entropy is often a vague and abstract concept. I will now give a microscopi
Note 3. Entropy I: Entropy in terms of heat
3.1 Reversibility and equilibrium: a recapitulation
Let's briefly recap some important concepts we've learned in the previous chapter: 1. Conservation of energy: If the internal energy U changes, this change in
Note 2. Energy
2.1 Ideal gases: A simple system to play with
Ideal gases are a natural place to start learning about thermodynamics. We have some intuition about how gases work and an "ideal" gas is the simplest model. In particular, an ideal gas is a gre
Note 1. Introduction
1.1 What is thermodynamics?
Thermodynamics is a theory which gives us a set of relations between macroscopic properties we can measure (temperature, volume, pressure, length). What's really remarkable about it is that it requires no a
Problem Set 4: Due by Mar. 29 in class
Problem 1. One mole of ideal gas is compressed isothermally from 1 to 5 bar at 100 C. (a) What is the Gibbs energy change, G? (b) What would have been the Gibbs energy change if the compression had been carried out a
Homework 3: Due at the beginning of class 03/12/10
Problems 1. Proteins have to fold into a single configuration to be able to function as molecular machineries. Now consider the following 2D model of protein folding. The model assumes (1) The protein has