If the internal energy of a thermodynamic system is increased by 300J while 75J of expansion work is done?
how much heat was transferred and in which direction to or from the system?
The internal energy of the system is characterized by the
equation U = Q + W where U is the internal energy, Q is the heat and W is work.
You are given 300J of internal energy and 75J of expansion work. The heat energy
is 225J.
