Heat is added to an open pan of water at 100.0°c, vaporizing the water. the expanding steam that results does 43.0 kj of work, and the internal energy of the system increases by 604 kj. how much energy is transferred to the system as heat?

Question

Leonie

Physics

23 June, 12:40

Heat is added to an open pan of water at 100.0°c, vaporizing the water. the expanding steam that results does 43.0 kj of work, and the internal energy of the system increases by 604 kj. how much energy is transferred to the system as heat?

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Jarrett Carrillo · Answer 1

Heat = change in internal energy + Work done The internal energy of a system = heat added and mechanical work done by the system, i. e. U = Q + W rearranging the formula above, will give us: Q = deltaU + W

Q = U - W = 604 kJ - 43.0 kJ = 561,000 J would be the answer.