Q44 of 66 Page 55

Why does the rate of a reaction increase with rise in temperature?

Rate of reaction increases with the rise in temperature because according to the Maxwell-Boltzmann Energy distribution curve as temperature increases, fraction of molecules having energy greater than activation energy also increases, which results in the increase in number of effective collisions and thus rate constant and rate of reaction increases.


More from this chapter

All 66 →
42

For a general reaction A → B, plot of concentration of A vs time is given in Fig. 4.3. Answer the following question on the basis of this graph.


(i) What is the order of the reaction?


(ii) What is the slope of the curve?


(iii) What are the units of rate constant?


 43

The reaction between H2(g) and O2(g) is highly feasible yet allowing the gases to stand at room temperature in the same vessel does not lead to the formation of water. Explain.

 45

Oxygen is available in plenty in air yet fuels do not burn by themselves at room temperature. Explain.

 46

Why is the probability of reaction with molecularity higher than three very rare?