The amount of heat gained by the system is 425 J. The amount of work done by the system on the surroundings is 352 J. The change in Internal energy (🔺U) is ___________

Answer 1

∆U = q + w

∆U = change in internal energy = ?

q = heat = +425 J (+ because heat was gained by the system from the surroundings)

w = -352 J (- because work was done by the system on the surroundings)

∆U = 425 J - 352 J = +73 J