A gas-cooled nuclear reactor operates between hot and cold reservoir temperatures of 700°C and 27.0°C. What is the maximum percent efficiency of a heat engine operating between these temperatures?

Steam engines have boilers operating at 500K. The energy from a burning fuel converts water into steam and this steam then moves the piston. the temperature of the cold reservoir from the outside air is around 300K and the efficiency of both engines is 40%. to be able to increase the efficiency of the two machines again by increasing Th or by reducing Tc. Identify what factors cause an increase in engine efficiency in both engines and which are more effective in increasing engine efficiency?

A piston-cylinder assembly contains 0.7 lb of air initially at a pressure of 30 lbf/in² and a temperature of 100°F. The air is heated at constant pressure until its volume is doubled. Assume the ideal gas model with constant specific heat ratio, k = 1.4. Determine the work and heat transfer, in Btu.

The first law of thermodynamics, ΔU = Q - W, when written as Q = W + ΔU, says that the heat into a system can be used to do work and/or increase the internal energy. Therefore, which process requires the most heat? Isobaric, isochoric, or adiabatic?

Consider a heat pump that is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 5.81. On a particularly hot day, the temperature outside the home is 90◦F, and the temperature inside the home is maintained at 70◦F. If the heat pump consumes 500 W of electrical power, at what rate does it remove heat (W) from the home?

A Carnot engine uses hydrogen as its medium. The volumes at the beginning and end of the reversible adiabatic expansion process are 1.0 ft^3 and 2.5 ft^3, respectively. Find the thermal efficiency