First slide

Heat engine

Question

A carnot engine extracts 1200J of energy from a hot reservoir. What is the amount of work done by it? Temperatures of hot and cold reservoirs are 200K and 150K respectively.

Moderate

A

800J
B

900J
C

600J
D

400J

Solution

The efficiency of a carnot engine is:
1- T₂/T₁ = 1-150/200 = 1/4.
Efficiency is also given by: 1 – Q₂/Q₁ = 1 – Q₂/1200 = 1/4.
Q₂ = (3/4 ) $\times$ 1200 = 900J.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App