CO_2(g) + H₂O _{--> CO2(g) + H2(g)
Calculate the standard heat change of the reaction above if the standard enthalpies of formation of CO2(g), H2O(g) and CO(g) in KJ/mol are -394, -242, and -110 respectively.}

• A.+262 KJ/mol
• B.-262 KJ/mol
• C.+42 KJ/mol
• D.-42 KJ/mol