Question

A heat engine with an efficiency of 40% does 800J of work,each cycle.how much heat per cycle is lost to the surrounding?

Answer 1

Explanation:

Given : For Carnot engine,

⇒T

1

=600K T

2

=300K

⇒W=800J

We know,

Efficiency (n)=1−

T

1

T

2

=

Q

W

⇒

Q

W

=1−

600

300

⇒Q=

1−

2

1

W

⇒

2

1

800

⇒Q=1600J

i.e, heat given to system is 1600J.

Hence, the answer is 1600.