Question

For a gas sample containing equimolar amounts of carbon monoxideand heliumat 300 K, heliumhas _____________average speed and _____________ average kinetic energy compared tocarbon monoxidegas.a.a lower; the same b. the same; the same c. a higher; the same d. a higher; higher

Answer 1

Answer:

Option C (a higher; the same) is the appropriate response.

Explanation:

Given:

Temperature,

T = 300 K (both $N_2$ and $H_2$)

As we know,

Average speed of a molecule,

⇒ $\bar v=\sqrt{\frac{8RT}{\pi M} }$

Thus, the average speed of $N_2$ will be lower as its molar mass is greater than $H_2$.

Now,

⇒ $Average \ kinetic \ energy = \frac{3}{2} \ KT$ (not depend on molar mass)

Hence, it will be the same.

The other three alternatives aren't connected to the scenario given. So the above is the correct answer.