Efficiency of Heat Engines Video Lessons

Concept

# Problem: How is the thermal energy of a heat engine defined?A. The efficiency is defined as the ratio between the heat output at the lower temperature and the heat input at the higher temperature.B. The efficiency is defined as the ratio between the work performed and the heat output at the lower temperature.C. The efficiency is defined as the ratio between the work performed and the heat input at the higher temperature.D. The efficiency is defined as the ratio between the heat input at the higher temperature and the heat output at the lower temperature.

###### FREE Expert Solution

The thermal energy of a heat engine determines the efficiency of that heat engine.

Heat is supplied to the engine at a higher temperature.

The engine loses some heat at lower temperature.

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###### Problem Details

How is the thermal energy of a heat engine defined?

A. The efficiency is defined as the ratio between the heat output at the lower temperature and the heat input at the higher temperature.

B. The efficiency is defined as the ratio between the work performed and the heat output at the lower temperature.

C. The efficiency is defined as the ratio between the work performed and the heat input at the higher temperature.

D. The efficiency is defined as the ratio between the heat input at the higher temperature and the heat output at the lower temperature.