Which has maximum internal energy at 298 K?

Helium gas

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Oxygen gas

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Ozone gas

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Solution

The correct option is C Ozone gas
$U = \frac{n f R T}{2}$
$n :$ moles of gas, $f :$ degree of freedom, $R :$ universal gas constant, $T :$ temperature
We know that degree of freedom is directly related to the atomicity of gas.
Thus, $U$ is directly related to atomicity of gas at a particular temperature.
$U$ of ozone is maximum.

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Which has maximum internal energy at 298 K?

The correct option is C Ozone gasU=nfRT2n: moles of gas, f: degree of freedom, R: universal gas constant, T: temperatureWe know that degree of freedom is directly related to the atomicity of gas.Thus, U is directly related to atomicity of gas at a particular temperature.U of ozone is maximum.