Calculate ΔE for each of the following:
(a) q = -34 kJ, w = +88 kJ kJ
(b) q = +82 kJ, w = +40. kJ kJ
(c) q = +33 kJ , w = 0 kJ
(d) In which of these cases do the surroundings do work on the system? (Select all that apply:)
case a
case b
case c
none of the cases