I NEED HELP PLEASE, THANKS! :)

In a polar covalent bond, the less electronegative element will have a partial charge.

It will have a partial positive charge

Explanation:

If a polar molecule has a electronegative side it means it has more electrons on that side, which have a negative charge. So, that means if it is less electronegative it would be more positive than the other side. Hope this makes sense, I'm trying my best to explain but this is how I understand it. :)

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.