Can you help me with this thermochemistry problem?

Question

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?

Answer 1

U = q + w

U is internal energy

q is heat

w is work

 

When heat is absorbed by the system it is +, when given off to the surroundings it is -

When work is done by the system it is -, when work is done on the system by surroundings it is +

 

Expansion work is P∆V or pressure x change in volume

 

Use these to solve the problem.