First slide

Heat engine

Question

An inventor claims to have made an engine which consumes 1 g fuel per sec (of calorific value 2 kcal /g) and delivers 10 kW of power. Mark the correct statement:

Easy

A

This is possible.
B

This is impossible.
C

The possibility of the invention is determined by the design of the engine.
D

The possibility cf the invention is determined by the nature of the fuel.

Solution

$η_{\max} = 1 - \frac{T_{2}}{T_{1}} = \frac{W}{Q_{1}} < 1 (Always)$

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