When an ideal diatomic gas is heated at ...

When an ideal diatomic gas is heated at constant pressure the fraction of the heat energy supplied which increases the internal energy of the gas is

`2/5`

`3/5`

`3/7`

`5/7`

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The correct Answer is:

The desired fraction is `f= (Delta U)/(Delta Q) = (n C_V Delta T)/(n C_p Delta T) =(C_V)/(C_p) = 1/gamma` `f=5/7" "(as gamma = 7/5)`

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