Half-life can be found out for a reaction of?
Correct answer: C. Any order
- A. First order
- B. Second order
- C. Any order
- D. Zero order
Explanation
Option A: First order: For a reaction that follows first-order kinetics, the half-life is constant and is independent of the initial concentration of the reactant. The half-life can be calculated using the equation t(1/2) = (0.693 / k), where k is the rate constant of the reaction.Option B: Second order: For a reaction that follows second-order kinetics, the half-life is dependent on the initial concentration of the reactant. The half-life can be calculated using the equation t(1/2) = (1 / (k * [A]₀)), where [A]₀ is the initial concentration of the reactant and k is the rate constant of the reaction.Option C: The half-life can be determined for reactions of any order, but the specific method of calculation will depend on the order of the reaction.Option D: Zero order: For a reaction that follows zero-order kinetics, the half-life can be calculated using the equation t(1/2) = ([A]₀ / (2 * k)), where [A]₀ is the initial concentration of the reactant and k is the rate constant of the reaction.
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About Reaction Kinetics
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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