if a molecules in a solid has a temp of T = hf/2k then what would be the average energy of vibration

3 answers

KE=3/2 kT=3/2 k (hf/2k)=3/4 hf
sorry....but there is vibrational energy which is asked so this is not correct.
plese give me the answer in form of kT.
The standard formula for average energy of a solid molecule is (3/2)kT. According to equipartition theory each degree of freedom has energy of (1/2)kT. A solid has 3 degrees of freedom. Hence its energy is (3/2)kT. The answer posted is right. Must be some problem with the options. Pl. Check.