I’m not quite sure how to do this problem

Question

A gas absorbs 62 KJ of heat and does 94 KJ of work. Calculate (triangle symbol) E in kJ

Answer 1

∆E = q + w

∆E = change in internal energy = ?

q = heat = +62 kJ (+ because heat is absorbed)

w = work = -94 kJ (- because work is done by the system on the surroundings)

∆E = 62 kJ + (-94 kJ)

∆E = -32 kJ