Gas does work 200J. What will be the change in its internal energy if an amount of heat of 400 J is transferred to it?
| September 17, 2021 | education
A = 200 J
Q = 400 J
ΔU -?
According to the first law of thermodynamics, the amount of heat Q received by a thermodynamic system is spent on: performing mechanical work A by this system or increasing its internal energy ΔU> 0, that is, for heating: Q = A + ΔU.
ΔU = Q – A.
ΔU = 400 J – 200 J = 200 J.
Answer: the gas has heated up, and its internal energy has increased by ΔU = 200 J.
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