A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal expansion occurs at T H = 500 K and the isothermal compression occurs at T C = 290 K. Determine: (a)...

A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal expansion occurs atTH = 500 K and the isothermal compression occurs atTC = 290 K.

Determine:

(a) the thermal efficiency.

(b) the percent change in thermal efficiency ifTH increases by 5% whileTC remains the same.

(c) the percent change in thermal efficiency ifTC decreases by 5% whileTH remains the same.

(d) the percent change in thermal efficiency ifTH increases by 5% andTC decreases by 5%.