Question

A carnot engine working between 400
K and 800 K has a work output of 900 J
per cycle. The amount of heat energy
supplied to engine from the source per
cycle is​

Answer 1

Answer:

1600

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.

Answer 2

Answer:

The amount of heat energy supplied to engine from the source per cycle is 1800J

Explanation:

Given :- For carnot engine

work output 'W' = 900J

T₁ = 400k

T₂ = 800k

As we know that , Efficiency (η) = W/Q = (T₁/T₂-1)

∴ 900/Q = (400/800-1)

⟹ 900/Q = (1/2-1)

Q = 900×(-1/2)

• Q = -1800 J

(-ve) sign shows , energy is Spoiled into heat energy .

The amount of Heat energy supplied to engine from the source per cycle is 1800J