(e) The colligative properties (4%)

8. A reaction has a rate constant of $k = 1.77 \times 10^{-6} \, \mathrm{dm}^3 \, \mathrm{mol}^{-1} \, \mathrm{s}^{-1}$ at $25 \, ^\circ\mathrm{C}$ and an activation energy of $2000 \, \mathrm{J} \, \mathrm{mol}^{-1}$. (a) What order is the reaction? (Explain why) (5%)