Neither q nor w is a state function yet q + w is a state functio

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 Multiple Choice QuestionsShort Answer Type

31.

What is the main limitation of the first law of thermodynamics?

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32. Write the mathematical relationship connecting internal energy change, heat absorbed with work function.
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33.

Write mathematical statement of first law of thermodynamics.

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34.

In a process, 100J of heat energy is supplied and 50J of work is done on the system. What is the change in internal energy of the system ?

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35.

What is the difference between heat and work?

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36. Why heat is not a state function?
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37. Neither q nor w is a state function yet q + w is a state function. Explain why?


In the following formula
∆U = q + w


As ∆U is a state function, hence q+w is a state function.
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 Multiple Choice QuestionsMultiple Choice Questions

38. The enthalpies of all elements in their standard states are:

  • unity

  • zero

  • <0

  • different for each element
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 Multiple Choice QuestionsShort Answer Type

39.

Define extensive property ? 

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40.

Why heat changes reported are usually enthalpy changes and not internal energy?

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