An ideal Stirling cycle filled with air uses a 75 F energy reservoir as a sink. The engine is designed to so that the maximum air volume is 0.5 ft3 , the minimum air volume is 0.05 ft3 , and the minimum pressure is 15 psi. It is to be operated such that the engine produces 2 Btu of net work when 5 Btu of heat are transferred externally to the to the engine. Determine the temperature of the energy source, the amount of air contained inside the engine, and the maximum air pressure during the cycle.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.