Describes the limitations of heat transfer. It states that it is impossible for heat to spontaneously flow from a cold body to a hot body.

A system that converts heat to mechanical energy, which can then be used to do mechanical work.

Thermal efficiency is represented by the symbol "η"

In which part is the heat engine found in the image?

What device is being shown in the picture?

It expresses the fraction of heat that becomes useful work, a dimensionless performance measure of a device that uses thermal energy

The expansion of gas during cooling and gas compression when cooled makes the Stirling engine work.

With regards to the image, which part is the hot reservoir?

A. Heat Engine is a device that transforms thermal energy into mechanical energy.

B. Heat Pump is device that removes heat from a cold body and transfers it to a hot body

If a heat engine puts in 600J of work and gives out 140J of useful work. Calculate the heat efficiency.

A heat engine absorbs 5800J of heat energy from a hot reservoir and discards 3200J into the environment.

Calculate the thermal efficiency of this engine.

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