[填空题]
1.Distinguish between1/w gmqq;w/sw:rbwvi rus e/)sy p2/9an ideal gas and a non-ideal gas with reference to the internal energy of the yiv/2)p: 9bwreu/ srs 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 $2.5\times10^4\,Jkg^{−1}K^{−1}$.
(1)Calculate the increase in total kinetic energy of the molecules of the ideal gas. The increase in total kinetic energy of the ideal gas is = $\times10^5\,J$
(2)The average speeds of the molecules at $127^{\circ}C$ to $327^{\circ}C$ are $v_i$ and $v_f$ respectively. Calculate $\frac{v_i}{v_f}$. $\frac{v_i}{v_f}$ =