a certain engine has a second-law efficiency of 85%. During each cycle, it absorbs 480J of heat form a reservoir at 300C and dumps 300J of heat to a cold termperature reservoir. What is the temperature of the cold reservoir?

Question

Physics

Amaya Stokes

4 July, 01:13

a certain engine has a second-law efficiency of 85%. During each cycle, it absorbs 480J of heat form a reservoir at 300C and dumps 300J of heat to a cold termperature reservoir. What is the temperature of the cold reservoir?

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Answers (1)

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Kenya · Answer 1

Tc = 85.95 K

Explanation:

Given:

Th = 300 C = 573 K

η = 85 % =.85

Tc=?

so we have equation for Efficiency

η = 1 - (Tc/Th)

⇒Tc = (1 - η) Th

Tc = (1 -.85) x 573 K

Tc = 85.95 K