In this reaction of methane, CH4, 1664k) of energy are taken in , per mole of methane H
H-C-H (g)
--> C (S)
+ 4H (9)
H
Note that no bonds are formed in this reaction.
a) Why is this reaction endothermic?

it is endothermic because it doesn't affect the glass used

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet