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Rates of reaction

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Question 39

A student investigates the reaction between aqueous sodium thiosulfate and dilute hydrochloric acid at different temperatures.

Na2S2O3(aq)+2HCl(aq)→2NaCl(aq)+S(s)+SO2(g)+H2O(l) \text{Na}_2\text{S}_2\text{O}_3(\text{aq}) + 2\text{HCl}(\text{aq}) \rightarrow 2\text{NaCl}(\text{aq}) + \text{S}(\text{s}) + \text{SO}_2(\text{g}) + \text{H}_2\text{O}(\text{l}) Na2​S2​O3​(aq)+2HCl(aq)→2NaCl(aq)+S(s)+SO2​(g)+H2​O(l)

The diagram below shows the Maxwell-Boltzmann distribution of molecular energies for the reaction mixture at two different temperatures, T1 T_1\,T1​ and T2T_2T2​, where T2>T1T_2 > T_1T2​>T1​.

Maxwell-Boltzmann distribution curve

Using your knowledge of collision theory and referring to the Maxwell-Boltzmann distribution, explain how increasing the temperature from T1 T_1\,T1​ to T2 T_2\,T2​ affects the rate of this reaction.

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