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Arrhenius Equation

55 In a rever...

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55 In a reversible reaction, the forward reaction was 3 time faster than that of reverse reaction. The reaction quotient is _______

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Q. The diagram above shows how the potential energy changes as reactants are converted to products for a given reaction. From the diagram, it can be concluded that the
(1) overall reaction is endothermic
(2) activation energy of the forward reaction is greater than that for the reverse reaction
(3) forward reaction is a more rapid reaction than the reverse reaction

Q. Assertion : A catalyst that increases the rate of a forward reaction also increases the rate of the reverse reaction
Reason : The activation energy for a forward reaction is necessarily equal to the of the reverse reaction.

A catalyst increases the rate of forward reaction without influencing that of reverse reactions.

Q. In a reversible reaction, study of the mechanism says that both the forward and reverse reaction follows first order kinetics. If the half - life of forward reaction,

{⎛ ⎜ ⎝ t_{\frac{1}{2}} ⎞ ⎟ ⎠}_{f}

is 400 sec and that of reverse reaction,

{⎛ ⎜ ⎝ t_{\frac{1}{2}} ⎞ ⎟ ⎠}_{f}

is 250 sec. The equilbrium constant

(K_{e q})

of the reaction is-
Given:

⎛ ⎜ ⎝ t_{\frac{1}{2}} ⎞ ⎟ ⎠

\frac{0.693}{k}

Q. Assertion: The overall rate of a reversible reaction may decrease with the increase in temperature.
Reason: When the activation energy of a forward reaction is less than that of its backward reaction, then the increase in the rate of the backward reaction is more than that of the forward reaction on increasing the temperature.

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