4. A cylinder of an internal combustion engine as shown on the Figure below contains 2450 cm³ of gaseous combustion products at a pressure of 7 bar and a temperature of 867°C just before the exhaust valve opens. Determine the specific exergy of the gas, in kJ/kg. Ignore the effects of motion and gravity, and model the combustion products as air behaving as an ideal gas. Take To 300K (27°C) and po = 1.013 bar. = 2450 cm³ of air at 7 bar, 867°C