1. The problem statement, all variables and given/known data Suppose you have 7 atoms with only 6 quanta. If you add 2 quanta to the system, find the change in entropy to the system. 2. Relevant equations S = k_B*ln(omega) Change in S = S_f - S_o 3. The attempt at a solution So, I found the multiplicity, before and after, using the following equation to find the number of states: Number of states = (q + N - 1)!/[q!(N-1)!]. So, I obtained 924 states for the initial system and 3003 states for the final system. I tried to do: Change in S = k_B*ln(3003) - k_B*ln(924)... but ended up with the incorrect answer. Is there something wrong with my reasoning?