At 700 K the equilibrium constant KC for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7 × 106. The rate constant for the reverse reaction at this temperature is 0.54 M–1s–1. What is the value of the rate constant for the forward reaction at 700 K?

Answer : The value of the rate constant for the forward reaction at 700 K is,

Explanation :

The given chemical equilibrium reaction is:

The expression for equilibrium constant is:

The expression for rate of forward and backward reaction is:

and,

As we know that at equilibrium rate of forward reaction is equal to rate of backward reaction.

Given:

Now put all the given values in the above expression we get:

Therefore, the value of the rate constant for the forward reaction at 700 K is,

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