a system releases 425 kj og heat and does 307 kj of work on the surroundings in the process. what is the change in the internal energy of the system

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09-12-2022
Physics

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a system releases 425 kj og heat and does 307 kj of work on the surroundings in the process. what is the change in the internal energy of the system

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abhinavjh321 abhinavjh321 · Answer 1 · 2022-12-16T03:45:41-05:00

A system produces 307 kj of work for the environment while releasing 425 kj of heat. The system's internal energy changes as 118kj

According to the first law of thermodynamics, heat is a form of energy, and consequently, thermodynamic processes are governed by the idea of conservation of energy. Heat energy cannot be created or destroyed, so it makes sense.

Given that heat released by system (Q) = -425kj as heat is released

Work done by the system (W) = -307kj

internal energy change in the system is ΔU

ΔU = Q + W = -425 + (-307) = -732kj

Because we know from conservation of energy Q>0 and W<0

There is decrease in internal energy

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