States of Matter and Gaseous StatehardMCQ SINGLE⭐ Must-Do

The temperature at which the root mean square () speed of gas becomes exactly equal to the average sStates of Matter and Gaseous State Chemistry Question

Question

The temperature at which the root mean square ($U_{rms}$) speed of $SO_2$ gas becomes exactly equal to the average speed ($U_{avg}$) of $O_2$ gas at $27^\circ\text{C}$ is:

Answer: A

💡 Solution & Explanation

$U_{rms}(SO_2) = U_{avg}(O_2) \implies \sqrt{3RT/64} = \sqrt{8R(300)/(32\pi)}$. Squaring both sides: $3T/64 = 75/\pi \implies T = 1600/\pi \approx 509.3\text{ K}$. In Celsius: $509.3 - 273.15 \approx 236^\circ\text{C}$.

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