$.$

An engine absorbs

$1\mathrm{.}70$

kJ from a hot reservoir at

$277$

C

$$

and expels

$1\mathrm{.}20$

kJ to a cold reservoir at

$27$

C

$$

in each cycle.

What is the engine$$s efficiency?

SHOW ANSWER

How much work is done by the engine in each cycle?

SHOW ANSWER

What is the power output of the engine if each cycle lasts

$0\mathrm{.}300$

s$?$

A heat engine operates between a reservoir at

$25$

C

$$

and one at

$375$

C

$$

$.$ What is the maximum efficiency possible for this engine?