Steam at a temperature th = 180 ∘c and p = 1.00 atm enters a heat engine at an unknown flow rate. after passing through the heat engine, it is released at a temperature tc = 100 ∘c and p = 1.00 atm . the measured power output p of the engine is 580 j/s , and the exiting steam has a heat transfer rate of hc = 2450 j/s . find the efficiency e of the engine and the molar flow rate n/t of steam through the engine. the constant pressure molar heat capacity cp for steam is 37.47 j/(mol⋅k) .