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For a closed system, determine the chang...

For a closed system, determine the change in internal energy `(DeltaU) ` when (a) q cal of heat is absorbed by the system and w cal of work is performed on the system (b) q cal of heat is absorbed by the system and w cal of work is performed by the system (c) q cal of heat is evolved by the system and w cal of work is performed on the system (d) heat is not absorbed or evolved by the system, but w cal of work is performed by the system.

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Knowledge Check

  • Change in internal energy of a system is

    A
    heat absorbed by the system+work is done by the system
    B
    heat liberated by the system+work is done by the system
    C
    heat absorbed by the system +work is done on the system
    D
    heat liberated by the system+work is done on the system

  • An amount of work w is done by the system and q amount of heat is supplied to the system. By which the following relations the change in internal energy of the system can be expressed-

    A
    `DeltaU=q-w`
    B
    `DeltaU=q+w`
    C
    `DeltaU=q`
    D
    `DeltaU=w-q`
    • CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-LONG TYPE QUESTIONS
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    3. Identify the following processes each of which occurs in a closed syst...

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    6. Give one example for each of the following processes- (i) DeltaP (sy...

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    7. Give definition: (i) closed system (ii) adiabatic system (iii) open sy...

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