If the internal energy of He sample of 100J and that of the hydrogen sample is 200J, then the internal energy of the mixture is

Question

Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium M₁ = 4g and that of hydrogen M₂=2g

If the internal energy of He sample of 100J and that of the hydrogen sample is 200J, then the internal energy of the mixture is 

(A) 900J 

(B) 128.5J 

(C) 171.4J 

(D) 300J 

Answer 1

Correct option  (D) 300J

Explanation:

Since internal energy is an extensive property