Answer to Question #114396 in General Chemistry for Cesca

Question

Calculate the enthalpy change for this reaction given the following data. C(s) + 2 H2(g) → CH4(g)
ΔcH C(s) = -393, H2(g) = -286, CH4(g) = -890 kJ/mol

Answer 1

Enthalpy change $= -393-2*286+890=890-393-572=-75 kJ$