An ideal gas with a mass of 2 kg reversibly and polytropically expands up to 3 times its initial volume in a piston-cylinder assembly. The temperature of the ideal gas drops from 300 ° C to 60 ° C. a) The heat energy input is 20 kJ and the boundary work output is 100 kJ. Find the specific heats cv [kJ / kgK] and cp [kJ / kgK] for the gas. b) If the heat energy output is 20 kJ and the boundary work output is 100 kJ, calculate the specific heats of the gas cv [kJ / kgK] and cp [kJ / kgK]. c) Find the value k, which is the ratio of specific heats. d) If the heat energy input is 20 kJ, the boundary work output is 100 kJ and the entropy generation is 0.36 kJ / K, calculate the thermal energy source temperature as [° C].
An ideal gas with a mass of 2 kg reversibly and polytropically expands up to 3 times its initial volume in a piston-cylinder assembly. The temperature of the ideal gas drops from 300 ° C to 60 ° C.
a) The heat energy input is 20 kJ and the boundary work output is 100 kJ. Find the specific heats cv [kJ / kgK] and cp [kJ / kgK] for the gas.
b) If the heat energy output is 20 kJ and the boundary work output is 100 kJ, calculate the specific heats of the gas cv [kJ / kgK] and cp [kJ / kgK].
c) Find the value k, which is the ratio of specific heats.
d) If the heat energy input is 20 kJ, the boundary work output is 100 kJ and the entropy generation is 0.36 kJ / K, calculate the thermal energy source temperature as [° C].
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