Which ones are non-renewable resources

Non-renewable resources are resources that can take thousands of years to form, and don't always have a good effect on the ecosystem when used for power and other needs. Some non-renewable resources can be:

Coal

Natural Gases

Oil

Fossil fuels.

These are not the best options, but are abused because of their great use.

Hope this helps!

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

a corroding iron, if that's one of your choices