Answer:
C
Explanation:
A negative deltaH means that the reaction has to give up heat in order to happen. You have to treat deltaH as a reactant. So the question is do you need to add heat to the reactants to make the products. If you do, deltaH is plus.
Heat is required to make a solid go to a gas. deltaH is plus. A is not the answer.
A lot of heat is required for B (something like 400 Kj / mole. Like A, deltaH is plus and B is not the answer.
C: The liquid has to give up heat in order for the this reaction to take place. C is the answer.
D requires heat. It is not the answer.
It would most likely be .org or .com :)
Your welcome :D
Answer:
You better read more, kiddo.
If Calcium is Ca, why not Mg for magnesium; they are right next to each other; read until you know to Iron, Fe. (It is Fe because it is very long known, and kept its Latin name).
Like Sodium and Mercury and Lead &
Potassium. Look them up, & it will help you remember. Natrium, Hydragyrum, Plumbium et Kalium.
Good Luck!
Explanation: