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Define two specific heats of gas. Write ...

Define two specific heats of gas. Write the relation between them.

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For gases, specific heat capacity is known as molar specific heat capacity.
At constant volume, the quantity of heat necessary to increase the temperature of one mole of a gas from `14.5^@ C` to `15.5^@ C` is called molar specific heat capacity `C_V` at constant volume.
At constant pressure, the quantity heat necessary to increase the temperature of one mole of a gas from `14.5^@C` to `15.5^@ C` is called molar specific heat capacity `C_P` at constant pressure.
The relation between these two molar specific heat capacity is `C_P-C_V=R`.
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Knowledge Check

  • Assertion: The specific heat of a gas in an adiabatic process is zero and in an isothermal process is infinite. Reason: Specific heat of a gas is directly proportional to the heat in system and inversely proportional to change in temperature.

    A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    Both assertion and reason are true but reason is not the correct explanation of the assertion
    C
    The assertion is true but reason is false.
    D
    Assertion and reason both are false.

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