Delta U = Q-w

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Delta U = Q-w. Work done by isothermic process. When work is done by the system Delta Uq-w.

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Delta U Q W. The surrounding area loses heat and does work onto the system. Therefore q and w are positive in the equation ΔUqw because the system gains heat and gets work done on itself.

U 32PV or U 32nRT.

Nela não há trocas de calor. Delta U is actually equal to q w whereas q is the heat input or Delta H. U q w and w -PexΔV If V is constant then ΔV 0 and w 0. U 32PV or U 32nRT.