Answer:
A. 1.73 x 10^5 J
Explanation:
The internal energy of a gas is related to the average speed of the molecules of the gas. In fact:
- The internal energy, U, is directly proportional to the temperature of the gas, T, according to
[tex]U=\frac{3}{2}nRT[/tex]
- The temperature of the gas, T, is proportional to the square of the average speed of the molecules, v, according to
[tex]\frac{3}{2}kT=\frac{1}{2}mv^2[/tex]
where both terms represent the average kinetic energy of the molecules.
- Therefore, we can conclude that the higher the internal energy, the faster the average speed of the molecules: among the choices given, the sample with highest internal energy is sample A.
