which two values for ∆g and e0cell correctly indicate a spontaneous reaction? a) ∆g = -89 kj, e0cell = -0.46 v b) ∆g = -89 kj, e0cell = +0.46 v c) ∆g = +89 kj, e0cell = -0.46 v d) ∆g = +89 kj, e0cell = +0.46 v

Choice B is correct. and

Explanation: stands for Gibbs free energy equation. A reaction is spontaneous if is negative and the reaction non spontaneous if is positive.

For a cell, is calculated from the cell potential using the equation:

where, n is the moles of electrons transferred in a balanced equation, F is the faraday constant and is standard cell potential.

From the above equation, could only be negative if is positive as the equation has negative sign.

So, the only correct choice is the one for which is positive and is negative.

Hence. choice B is correct.