Problem: A given standard electrochemical cell is tested with a voltmeter and it  reads +0.035 volts. Having a good knowledge of chemistry, you immediately are thinking that the associated redox reaction has which of the following characteristics?A. ∆G° is zero and K is equal to 1.B  ∆G° is positive and K is greater than 1.C. ∆G° is negative and K is less than 1.D. ∆G° is positive and K is less than 1.E. ∆G° is negative and K is greater than 1. 

FREE Expert Solution

We're being asked to determine the characteristics for the standard electrochemical cell is tested with a voltmeter and it reads +0.035 volts.

Recall that the greater the E°cell of a redox reaction, the more likely the reaction will occur (more spontaneous reaction)

E°cell > 0 spontaneous in the forward direction
E°cell < 0 nonspontaneous in the forward direction


We have two ways (equations) of calculating the Gibbs Free Energy ΔG°:

Equation 1:

G°=-nFE°cell

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Problem Details

A given standard electrochemical cell is tested with a voltmeter and it  reads +0.035 volts. Having a good knowledge of chemistry, you immediately are thinking that the associated redox reaction has which of the following characteristics?

A. ∆G° is zero and K is equal to 1.

B  ∆G° is positive and K is greater than 1.

C. ∆G° is negative and K is less than 1.

D. ∆G° is positive and K is less than 1.

E. ∆G° is negative and K is greater than 1.

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