Question

21 J of heat energy is supplied to a diatomic ideak gas at constant pressure then chanve in internal energy of gas is?
1) 10 J
2) 12J
3) 15J
4) 18J​

Answer 1

∆q=ncpdt

21=1*7/2dt

dt=6

∆u=ncvdt

∆u=1*5/2*6

15