and what is the change in enthalpy for it?

Question

Coal is converted into cleaner more transportable fuels by burning it with oxygen to produce carbon monoxide.
The carbon monoxide then is reacted with hydrogen using a catalyst to produce methane and water. Is the reaction
between CO and H2 exothermic or endothermic, and what is the change in enthalpy for it? The enthalpies of
formation of the reatants and products are given below.
Molecule Ho
f in kJ/mol
CO - 110
H2 0
CH4 - 75
H2O - 242
A) exothermic, + 317 kJ/mol
B) endothermic, + 207 kJ/mol
C) exothermic, - 427 kJ/mol
D) endothermic, + 427 kJ/mol
E) exothermic, - 207 kJ/mol

please explain answer

Answer 1

CO + 3H2 ----> CH4 + H2O

Work out products minus reactants.

-75 + (-242) - (-110) = -207.