Use the Following to Answer the Question:
-The Internal $\circ$

Multiple Choice

Use the following to answer the question:
-The internal energy for a diatomic gas is given by U = 5nRT/2.Calculate the internal energy of a 100 g mixture of oxygen (20%) and nitrogen (80%) gas at 25 ^$\circ$ C.(The molar weight of O₂ = 32 g,and the molar weight of N₂ = 28 g.)

A) 21.6 kJ
B) 1.80 kJ
C) 12.1 kJ
D) 13.0 kJ
E) 1.10 kJ