A thermally isolated system at constant pressure consists of \(10 \mathrm{~kg}\) of air at a temperature of \(1000 \mathrm{~K}\) and \(10 \mathrm{~kg}\) of water at \(300 \mathrm{~K}\), connected together by a heat engine. What would be the equilibrium temperature of the system if

1. the heat engine has a thermal efficiency of zero;

2. the heat engine is reversible?

Assume

Transcribed Image Text:

for water c = 4.2 kJ/kg K; K = Cp/C = 1.0; for air: cy = 0.7 kJ/kg K; K = =Cp/C =1.4.