The expansion process in an internal combustion engine (i.e., the power stroke) is modeled as an isentropic process. You can model this process by assuming the system is composed of air. It's initial state is a pressure of 2200 psia and a temperature of 3600 R. The ratio between the volume at the final state to the volume at the initial state is 8. Determine the temperature and pressure at the final state and the work per unit mass transferred during the process.