Relationship between Heat and Electron Volts in a reaction

[NeilWallace]

Hi,
Im trying to understand the relationship between heat released in an energetically favourable chemical reaction and the released charged particles when the reactants are connected in a battery set up.

If you mix Zinc and copper sulphate you get heat and the product. Connect the copper and zinc in solution them with a salt bridge you get a flow of current and the product.

Is there a physical relationship/formula between the amount of heat released to predict the amount of current that would have been generated had you connected the reactants in a battery style set up.

 

[Studiot]

Ask yourself if the reactions proceed to the same extent in both cases.