Answer to Question #157240 in General Chemistry for jeniz

Question

Calculate the ΔH^o for methane gas , CH4, produced from graphite and hydrogen gas according to the following reaction: C_(graphite) + 2H₂(g) à CH₄(g)

Answer 1

[1ΔHf(CH4 (g methane))] - [1ΔHf(C (s graphite)) + 2ΔHf(H2 (g))]

[1(-74.85)] - [1(0) + 2(0)] = -74.85 kJ

-74.85 kJ     (exothermic)