Question

At a certain temperature, the degrees of freedom per molecule for gas is 8. The gas performs 150 J of work when it expands under constant pressure. The amount of heat absorbed by the gas will be ______ J.

Answer 1

The correct answer is : 750
$W = nR∆T = 150J$
$Q =(\frac{f}{2}+1)nR∆T$
$=(\frac{8}{2}+1)150$
$= 750J$