**Problem 1:**

**Calculate entropy S for 1.000 mole of the following ideal gases at 1.000 atm and 298K, and compare to the experimentally observed values:****(a) He (exp. value=15.16R)****(b) Kr (exp. value=19.72R)****(c) H _{2} (exp. value=15.65R) Θ_{rot} = 85.30K, Θ_{vib} = 6215K**

**(d) HBr (exp. value=23.85R) Θ**

_{rot}= 12.02K, Θ_{vib}= 3787K**Problem 2:**

**Calculate entropy of CO _{2} at 298K and 1 atm pressure using Θ_{rot} = 0.561K and Θ_{vib,j} = 3360, 954, 954 and 1890K.**

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