Show that the Kelvin–Planck and the Clausius expressions of the second law are equivalent.

In a steam power plant operating at steady state is supplied to the high pressure turbine at 5 MPa and 450 °C. after expansion to 500 kPa the steam is reheated at constant pressure to the original temperature. The steam expands in in the low pressure turbine to an exhaust pressure of 10 kPa.

Define reversible work, which is the maximum useful work that can be obtained as a system undergoes a process between two specified states.

20. PLEASE ANSWER ASAP

2 kg of Refrigerant-134a contained in a piston-cylinder device undergoes a reversed Carnot cycle. Some important information about the cycle is: ● At the beginning of the adiabatic compression (State 1), the refrigerant is a saturated vapor. ● The adiabatic compression ends when the temperature of the refrigerant is 30 degrees C● The refrigerant is 50% vapor by mass at the end of the isothermal heat rejection process. ● The adiabatic expansion process ends when the pressure of the refrigerant is 132.82kPaConsulting example 7-6 in your text might be helpful in understanding some aspects of this problem. a) Represent this cycle on a T-S diagram. On your diagram, clearly indicate the values of the specific entropy and temperature at every state. b) Explain (briefly) why the process curves take the shapes you indicated on your T-S diagram in part a.