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Thermodynamics

Short 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?

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Multiple Choice Questions

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

unity
zero
<0
different for each element

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Short Answer Type

39.
Define extensive property ?

An extensive property is a property whose value depends on the quantity or size of matter present in the system. For example, heat capacity etc. is extensive properties.

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40.

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

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Previous Year Papers

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Short Answer Type

Multiple Choice Questions

Short Answer Type

39. Define extensive property ?

39.
Define extensive property ?