State the changes as endo or exco of tghe following reactions:?

Question

a. C2h5OH(g) + 3 O2(g)----------------2CO2(g) + 3H2O(l) + 1367kj
b.CS2(l) +3O2(g)-----------------CO2(g) +2SO2(g) H'=-1105kj
c.H2O(l)----------------H+(aq) +OH- (aq) H'=+56.2kj
d.H2O(s) + H----------------------H2o(l)

Answer 1

Any combustion reaction is exothermic.
So a and b are exothermic.
c is the dissociation of water, which involves breaking bonds, so it is endothermic.
I think d is supposed to represent the melting of ice, which again takes in heat.