Answer to Question #98631 in Electrical Engineering for Hardi Amiru Sulemana

Question #98631
a quantity of a gas occupies 0.14 m cube at 9.65 bar and 371 degrees Celsius is heated during a constant volume process and the pressure reaches 41.4 bar. The gas is then expanded adiabatically to a pressure of 2.76 bar. Given that R is equal to 0.288 kilo joules per kilogram Kelvin and Gamma is equal to 1.41, calculate:
a) the temperature at the beginning of the expansion
b) the temperature at the end of the expansion
c) the heat energy supplied
d) the work energy transferred
1
Expert's answer
2019-11-15T07:07:38-0500

a) The temperature at the beginning can be found from the condition


where


Hot!

b) The adiabatic law (and keep in mind that for isochoric process ):


c) The word adiabatic means that no energy of heat is lost or supplied.

d) The work done in the adiabatic process while gas transferred from state 2 (0.14 cubic m, 41.4 bar) to state 3 (2.76 bar, 0.95 cubic m):



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