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Chemical Kinetics

Short Answer Type

171. Write the unit for specific rate constant for a second order reaction.

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172. What will be the shape of the curve of concentration of the reactant is plotted against time for a zero order reaction?

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173. Define activation energy of a reaction.

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174. Define half-life of a reaction.

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175. For the reaction Cl₂(g) + 2NO(g) → 2NOCl(g) the rate law is expressed as rate = k[Cl₂] [NO]².
What is the overall order of reaction?

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176. Express the rate of the following reaction in terms of disappearance of hydrogen in the reaction.
3H₂(g) + N₂(g) → 2NH₃(g)

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177. Wha t is meant by order of a reaction being zero?

In some reactions, the rate is apparently independent of the reactant concentration. The rates of these zero-order reactions do not vary with increasing nor decreasing reactants concentrations. This means that the rate of thereaction is equal to the rate constant, k , of that reaction.

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