The rate constant k is 0.693min-1. The half life for the first order reaction will be:
Correct answer: A. 1 min
- A. 1 min
- B. 0.693 min
- C. 2 min
- D. 4 min
Explanation
It can be calculated using the following formula: t½ = (0.693 / k) Given that the rate constant (k) is 0.693 min⁻¹, you can calculate the half-life as follows: t½ = (0.693 / 0.693 min⁻¹) = 1 minute.
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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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