What is the change in internal energy (ΔE)

Question

What is the change in internal energy (ΔE) for a system in kJ that produces 63.8 kJ of heat and is has 264 J of work on the system? Only enter the number and do not enter the unit. 

Answer 1

∆E = ∆H + w

∆H = -63.8 kJ (negative because the system produces heat)

w = +264 J = +0.264 kJ (positive because work is done ON the system)

∆E = -63.8 kJ + 0.264 kJ = -63.5 kJ