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In a process, a system does 145 J of wor...

In a process, a system does 145 J of work on its surroundings while 85 J of heat is added to the system. What is `DeltaU` for the system?

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`DeltaU = q + w = 85 + (-145) = -60J`
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MODERN PUBLICATION-THERMODYNAMICS-Revision Exercise (Very short answer questions)
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  6. Write Gibbs Helmholtz equation giving meanings of the symbols used.

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  13. What is the effect of temperature on entropy?

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  15. Write mathematical statement of first law of thermodynamics.

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  18. Explain how an endothermic reaction can be spontaneous.

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  20. What is entropy? Give its units.

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