A body weighing 10 kilograms was transferred an amount of heat of 120 J and raised it above the earth’s surface by 5 m
| February 10, 2021 | education
A body weighing 10 kilograms was transferred an amount of heat of 120 J and raised it above the earth’s surface by 5 meters. Determine how much the body’s internal energy has increased?
According to the first law of thermodynamics.
Q is the amount of heat imparted to the body.
A – work done by the body.
dU = change in internal energy.
Q = dU + A.
dU = Q – A.
The body was given 120 Joules of heat.
When the body is raised to a height of 5 meters, the body does not work.
A = 0.
dU = 120 – 0 = 120 J.
Answer: 120 J.
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