Chemistry

Problem

32.0\,\text{g}

sample of

\mathrm{O_2(g)}

is heated at constant volume from

250\,\text{K}

500\,\text{K}

. Given

R = 8.314\,\text{J mol}^{-1}\,\text{K}^{-1}

, what is the increase in average kinetic energy per gram of

\mathrm{O_2}

, expressed in

\text{kJ g}^{-1}

? a)

0.065\,\text{kJ g}^{-1}

0.195\,\text{kJ g}^{-1}

0.097\,\text{kJ g}^{-1}

9.7\,\text{kJ g}^{-1}