In a unimolecular reaction with three times as much starting material as product at equilibrium, what is the value of Keq? Is ΔG o positive or negative? Enter Keq as a decimal. Be sure to answer all parts. Keq =

Answer : The value of is, 0.33 and = positive.

Explanation :

The unimolecular reaction is:

In unimolecular reaction, the starting material is 2 times to the product.

     .........(1)

As we know that:

    ...........(2)

Now substitute equation 1 in 2, we get:

Now we have to calculate the value of at 298 K.

where,

= standard Gibbs free energy = ?

R = gas constant = 8.314 J/mol.K

T = temperature = 298 K

= equilibrium constant = 0.33

Now put all the given values on the above formula, we get:

Thus, the value of at 298 K is, 2746.8 J/mol

As we know that:

= +ve, reaction is non spontaneous

= -ve, reaction is spontaneous

= 0, reaction is in equilibrium

Thus, the = +ve. So, the reaction is non spontaneous.

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