Question

What is the efficiency of an engine that gives off 70% thermal energy?

Answer 1

Answer:

If this, ie 70%, is the total energy loss, it follows that the engine is producing 30% useful energy, so that is its thermodynamic efficiency.

Answer 2

The efficiency will be 30%.

Explanation:

First, understand about the efficiency of an engine =

⇒The efficiency of a heat engine is defined as the ratio of the useful work that we get from the engine to the heat that is lost during the process.

Here in the question, it is given that the heat lost 70% energy as heat.

So, here the useful work done by the heat engine is equal to 30%.