Answer to Question #156602 in General Chemistry for Jon jay mendoza

Question

1. 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)

data given

1. C_(graphite) + O₂(g) à CO₂(g) ΔH^o= -393.5 kJ
2. H₂(g) + ½ O₂(g) à H₂O(l) ΔH^o= - 285.8 kJ
3. CH₄(g) + 2O₂(g) à CO₂(g) + 2H₂O(l) ΔH^o = -890.4kJ

COMPLETE SOLUTION AND ENCIRCLE/BOX THE FINAL ANSWER

Answer 1

∆H= -890.4 -(-393.5 -(-285.8 x 2 )) = 74.7 kJ.