[Pierrotechnique]

Alright so I'm stuck with this problem that's asking me to calculate the change in internal energy of a reaction at 25 degrees C and that has a enthalpy change of -3256 kJ/mol. So I'm thinking using :delta:U = :delta:H - RT(n_f-n_i) but then which value of R would I use, and on top of that it would introduce a pressure unit into the whole thing which I don't want because I want a final answer in kJ/mol. So where do I start to analyse this problem?

[rabolisk]

Alright so I'm stuck with this problem that's asking me to calculate the change in internal energy of a reaction at 25 degrees C and that has a enthalpy change of -3256 kJ/mol. So I'm thinking using :delta:U = :delta:H - RT(n_f-n_i) but then which value of R would I use, and on top of that it would introduce a pressure unit into the whole thing which I don't want because I want a final answer in kJ/mol. So where do I start to analyse this problem?

Would it introduce a pressure unit? Perhaps not if you choose the correct gas constant.

[Pierrotechnique]

Yeah I just realized that later last night... Big oversight on my part!