本题目来源于试卷: Particulate Nature of Matter B.3 Ideal Gas Model，类别为 IB物理学
[问答题]
1.Distinguish between an ideal gas and a non-ideal gas with reference to the internal energy of the molecules.
2.An ideal gas of mass $20g$ is heated in a sealed container. The temperature of the gas is increased from $127^{\circ}C$ to $327^{\circ}C$. The specific heat capacity of the gas at constant volume is $2.5\times10^4\,J\,kg^{-1}K^{-1}$.
1.Calculate the increase in total kinetic energy of the molecules of the ideal gas.
2.The average speeds of the molecules at $127^{\circ}C$ and $327^{\circ}C$ are $v_i$ and $v_f$ respectively. Calculate $\frac{v_i}{v_f}$
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