(Solved): A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal e ...

A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal expansion occurs at

and the isothermal compression occurs at

. Determine: (a) the thermal efficiency. (b) the percent change in thermal efficiency if

increases by

while

remains the same. (c) the percent change in thermal efficiency if

decreases by

while

remains the same. (d) the percent change in thermal efficiency if

increases by

and

decreases by

.