The combustion of a fuel usually results in an increase in pressure when the volume is held constant, or an increase in volume when the pressure is held constant, because of the increase in the number of moles and the temperature. The increase in pressure or volume will be maximum when the combustion is complete and when it occurs adiabatically with the theoretical amount of air. Consider the combustion of methyl alcohol vapor (CH3OH (g)) with the stoichiometric amount of air in a 0.8-L combustion chamber. Initially, the mixture is at 25°C and 98 kPa. Determine
(a) The maximum pressure that can occur in the combustion chamber if the combustion takes place at constant volume and
(b) The maximum volume of the combustion chamber if the combustion occurs at constant pressure.