Discussion
All of the following are ways of determining reaction order EXCEPT
Answer: B
Correct answer: measuring the heat of reaction calorimetrically
The heat of reaction is a thermodynamic quantity fixed by the initial and final states, so it says nothing about how the rate depends on concentration. The other three are genuine methods: comparing half lives at several starting concentrations, testing trial integrated rate laws for the one that linearises the data, and taking slopes of concentration against time to fit the differential form directly.
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