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Statement I : In an isothermal process t...

Statement I : In an isothermal process the whole heat energy supplied to the body is converted into internal energy.
Statement II : According to the first law of thermodynamics `Delta Q = Delta U + p Delta V`.

A

Statement I is true, statement II is true, statement II is a correct explanation for statement I.

B

Statement I is true, statement II is true, statement II is not a correct explanation for statement I.

C

Statement I is true, statement II is false

D

Statement I is false, statement II is true.

Text Solution

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The correct Answer is:
D
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If the internal energy U and the work W are expressed in unit of J and the heat is expressed in unit of cal, the first law of thermodynamics will be [here J = Joule's equivalent]

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Knowledge Check

  • If the internal energy U and the work W are expressed in unit of J and the heat is expressed in unit of cal, the first law of thermodynamics will be

    A
    Dq=d U+dw/J
    B
    Dq=d U+jdw
    C
    JdQ=du +dw
    D
    Dq/J= du+dw

  • If the internal energy U and the work W are expressed in unit of J and the heat is expressed in unit of cal, the first law of thermodynamics will be

    A
    A. Dq=d U+dw/J
    B
    B. Dq=d U+jdw
    C
    C. JdQ=du +dw
    D
    D. Dq/J= du+dw

  • Statement I: if work done by conservative force is negative then potential energy associated with that force should increase. Statement II: This is from the reaction Delta u =- W. Here Delta u is change in potential energy and W is work done by conservative force.

    A
    Statement I is true, statement II is true, statement II is a correct explanation for statement I.
    B
    Statement I is true , statement II is true, statement II is not a correct explanation for statement I.
    C
    Statement I is true, statement II is false.
    D
    Statement I is false, statement II is true.

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