Plus two molecules of water in a liquid state will produce diatomic gas, plus another diatomic gas, plus this two hydroxide acreage state and two sodium molecules in the acreage state. We also add up these cell voltages and we get this following cell voltage. So this is the amount of energy electrical work that needs to be put in by the battery to power this reaction. So we see that decomposition reactions require work. Well, why? Well, that's because they're unfavorable redox reactions.