Question

At what temperature will hydrogen molecules have the same $KE$ as nitrogen molecules at $280K$?

• A. $280K$
• B. $40K$
• C. $400K$
• D. $50K$

Answer 1

The correct option is A $280K$

as we know,

$KE=\frac{3}{2}RT$

$KE\propto T$

so at 280K, hydrogen molecules have the same KE as nitrogen molecules at 280 K.

Hence, the correct option is $\text{A}$