Assume that at the start of the reaction ΔG is a large negative number. As the...

Assume that at the start of the reaction ΔG is a large negative number. As the reaction proceeds toward equilibrium, which of the following are true?

1. The value of Q approaches the value of Keq.
2. The rate of the forward reaction is slowing down as the rate of the reverse reaction is speeding up.
3. The value of Q decreases.
4. The value of Keq decreases.
5. The value of Delta G° increases.
6. The value of Delta G° approaches the value of Delta G.
7. The value of Delta G increases.

Solutions

Expert Solution

At equilibrium change in free energy (ΔG) is equal to zero. Equilibrium constant for a perticular equilibrium reaction is constant at constant temperature. So it does not change.

Suppose a reaction starts with certain rate and it reaches equilibrium. During this process Q increases as as the concentrations of products increases and it will reach value of Keq. That means initially there are only reactants so concentration of products is zero, as the reaction procceds slowly concentration of products increases and concentration of reactants decreases. That means rate of forward reaction decreases and rate of the backward reaction increases this process is continuous untill rate of the forward reaction is equal to rate of the backward reaction. Then equilibrium is attained.

There fore among the given statements only two are true they are

1. The value of Q approaches the value of Keq.
2. The rate of the forward reaction is slowing down as the rate of the reverse reaction is speeding up.

queen_honey_blossom answered 2 months ago

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