) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in the heat source to get 1000 Js of work?
) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in the heat source to get 1000 Js of work?
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(a) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in the heat source to get 1000 Js of work?
(b) When an ideal gas with Cp=5 cal/(mol·K) is compressed to 25°C, and 10°C through an adiabatic and reversible process, what is the final temperature of the gas?
(c) In an ideal gas turbine power device, the pressure ratio is 6, the temperature entering the compressor is 27°C, and the maximum allowable temperature of the turbine is 816°C. What is the efficiency of this power device when it is carried out in reversible operation? However, the specific ratio is 1.4.
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