The mechanical equivalent of heat J is :...

The mechanical equivalent of heat J is :

a constant

a physical quantity

a conversion factor

none of the above

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The correct Answer is:

a conversion factor

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5g of a gas is contained in a rigid container and is heated from 15^@C to 25^@C . Specific heat capacity of the gas at constant volume is 0.172 cal g ^(-1)^@C^(-1) and the mechanical equivalent of heat is 4.2 J cal . Calculate the change in the internal energy of the gas.

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FULL MARKS-HEAT AND THERMODYNAMICS-ADDITIONAL QUESTIONS SOLVED (I. Choose the correct answer from the following)

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