Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m' /kg at the beginning of expansion. The expansion of the gases...

Extracted text: Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m' /kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv"= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. If the heat rejected to the cylinder cooling water or gases during the expansion stroke is 140 kj/kg. Calculate the final specific volume and the polytropic index(n).