Question

At what temperature is the rms speed of gaseous hydrogen molecules equal to that of oxygen molecules at 47⁰C ?

• A. 20 K
• B. 80 K
• C. –73 K
• D. 3 K

Answer 1

Answer: (A)

20 K

Answer 2

$\sqrt{\frac{3RT}{2}} = \sqrt{\frac{3R \times 320}{32}}$ ; T = 20K