7. The gas in an engine cylinder has a volumetric analysis of 12% of CO, 11.5% O, and 76.5% N2. The temperature at the beginning of expansion is 1000°C and the gas mixture expands reversibly through a...

Extracted text: 7. The gas in an engine cylinder has a volumetric analysis of 12% of CO, 11.5% O, and 76.5% N2. The temperature at the beginning of expansion is 1000°C and the gas mixture expands reversibly through a volume ratio of 7: 1, according to a law pu 1.25 = constant. Calculate the work done and the heat flow per kg of gas. The values ofc, for the constituents are as follows:c, for CO, = 1.235 kJ/kg K ;c, for O, = 1.088 kJ/kg K ; c, for N, = 1.172 kJ/kg K. [Ans. 536.3 kJ/kg ; 96 kJ/kg (heat supplied)]