Rate of formation of SO3 in the reaction 2SO2 + O2 → 2SO3 is 2 moles min-1. Hence rate of disappearance of SO2 will be:
Correct answer: A. 2 moles min-1
- A. 2 moles min-1
- B. 4 moles min-1
- C. 8 moles min-1
- D. 3 moles min-1
Explanation
Stoichiometric ratio of SO2 : SO3 = 2 : 2 = 1 : 1 Rate of formation of SO3 = 2 moles min -1 As the ratio is 1 : 1 ∴ rate of formation of SO3 = rate of disappearance of SO2 Rate of disappearance of SO2 = 2 mole min-1
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Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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