posted by Will on .
A system does 196 J of work on its environment and gains 40 J of heat in the process.
(a) What is the change in the internal energy of the system?
(b) What is the change in the internal energy of the environment?
I thought the answer would be +40 for the system and -40 for the enveironment sin the system gain 40 j of heat, but that is not the correct answer. What am I doing wrong.
Work done by the system is -.
It seems to me that the system does 196 J work so that is -196 J. It receives 40 J of heat which is +. Therefore, -196+40 would be the change. The environment would be the negative of that. Check my thinking.