1. By a direct summation calculate that the partition function for the rotational states of para H2 at 100 K. Para H2 that has a value of B/kT at this temperature of 0.87 and the selection rules restrict J to 0,2,4,6, etc.

2. Calculate the rotational, vibrational, and translational entropy of DCl at 25 C. Use a bond length of 0.131 nm and a force constant of 516 N/m.