The following table gives data, in kJ, for a system undergoing
a thermodynamic cycle consisting of four processes in
series. For the cycle, kinetic and potential energy effects can
be neglected. Determine
(a) the missing table entries, each in kJ.
(b) whether the cycle is a power cycle or a refrigerationcycle.
Process    ΔU          Q               W
1–2                                           -610
2–3         670                            230
3–4                         0 920
4–1         -360    0