Voltage and the concept of work

[user111_23]

Okay, I understand that voltage is the work done per unit of charge from the electric field to move a charge from one point to another.

What does it mean for work being done on a charge? Are the charges being moved by an electric field? If so, why would the electrons move towards the negative terminal in a battery? Why not the positive terminal? (Since + goes with -.)

 

[Mapes]

To do work on a charge, we have to move it in opposition to an electric field. We do work, the charge gains energy.

In the case of a battery, electrons in the external circuit move spontaneously from the negative terminal to the positive terminal. Ions inside the battery complete the circuit, driven by a chemical reaction that performs work on the ions.

 

[user111_23]

To do work on a charge, we have to move it in opposition to an electric field. We do work, the charge gains energy.

In the case of a battery, electrons in the external circuit move spontaneously from the negative terminal to the positive terminal. Ions inside the battery complete the circuit, driven by a chemical reaction that performs work on the ions.

I understand that. However, where is work coming from? What causing work to be done on the charge?

 

[Mapes]

The work comes from the chemical potential energy of two or more chemicals that are not at equilibrium and react when placed together.

 

[user111_23]

The work comes from the chemical potential energy of two or more chemicals that are not at equilibrium and react when placed together.

Ah that makes sense. Thanks!