1.

During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratioC_P/C_V for the gas is

Answer»

`3//2`
`7//2`
`5//3`
`9//7`

Solution :According to the equation,
`Pprop T^3 ` or `P = kT^3 RARR PT^(-3) = K`…(i)
Now , for reversible adiabatic process
we have `T^GAMMA. P^(1 - gamma)= k`…..(II)
` rArr T^((gamma)/(1 - gamma)) .P = k`....(III)
compare (i) and (iii) , we get
`(gamma)/(1- gamma)=- 3 rArr gamma = 3/2`


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