Question

how does increasing temperature increase the rate of a reaction?
lowering the δh
lowering the eₐ
increasing the frequency of collisions and the proportion of molecules with sufficient energy, the eₐ
increasing the proportion of molecules with sufficient energy, the δh

Explanation:

Increasing temperature makes molecules move faster, leading to more frequent collisions. Also, a greater proportion of molecules have energy equal to or greater than the activation energy ($E_a$). $\Delta H$ (enthalpy change) is not directly affected by temperature in terms of changing reaction - rate in this context, and temperature does not lower $E_a$.

Answer:

C. Increasing the frequency of collisions and the proportion of molecules with sufficient energy, the $E_a$