States of Matter and Gaseous StatemediumMCQ SINGLE

The translational kinetic energy of molecules of is J at –123°C. Another sample of at 27°C has transStates of Matter and Gaseous State Chemistry Question

Question

The translational kinetic energy of $N$ molecules of $\text{O}_2$ is $x$ J at –123°C. Another sample of $\text{O}_2$ at 27°C has translational kinetic energy of $2x$ J. The latter sample contains

Answer: A

💡 Solution & Explanation

T doubles from 150K to 300K, which doubles KE per molecule. Since total KE is 2x, N is identical. Therefore, correct answer is A.

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