NEET 2020 Model Question Paper 4

The internal energy of 2 moles of O2 atom is UO2=

n1f1

2

RT =2×

5

2

×RT=5RT
The internal energy of 4 moles of Ar atom is
UAr=

n2f2RT

2

=4×

3

2

×RT=6RT
∴ The total internal energy of the system is
UAr=

n2f2RT

2

=4×

3

2

×RT=6RT
∴ The total internal energy of the system
U=UO2+UAr =5RT+6RT=11RT