[填空题]
1.Distinguish between an ideal gas and a non-ideal gas with reference to trq +oax 7. epfzc7klku89)w)d/ s/ylkh22 uizwqdg0u+:(nrcfi6s u2q e internal ene r62wsduzqi(cu f+q2in:2 gu0 rgy 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 $2.5\times10^4\,Jkg^{−1}K^{−1}$.
(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 $\frac{v_i}{v_f}$. $\frac{v_i}{v_f}$ =