Need help!! Ok, I'm having problems with the following question: A container is filled with an unknown gas. To heat 1 kg of the gas by one degree under the constant pressure one needs 907.8 J, while the same increase of temperature of the gas when the colume is kept constant, needs 648.4 J. Determine what gas is in the container. -- if you guys can help point me in the right direction i'd appreciated it!