What is a heat engine?

Problem Statement

What is a heat engine?

Step-by-Step Explanation

A heat engine converts thermal energy into work by moving heat from a hot reservoir to a cold reservoir.

1. Identify what the question is asking. In Thermodynamics, this usually means naming the known quantities, the unknown quantity, and the concept that connects them.
2. Write the relevant definition, rule, or relationship before substituting numbers or manipulating symbols.
3. Work one step at a time and keep units, signs, and restrictions visible.
4. Check whether the answer makes sense in the original context.

Final Answer

A heat engine converts thermal energy into work by moving heat from a hot reservoir to a cold reservoir. The reliable strategy is to start from the definition, apply the correct rule carefully, and then interpret the result in plain language.