Consider the reactions given below. On the basis of these reactions find out which of the algebric relations given in options (I) to (iv) is correct?
(a) C (g) + 4 H (g) → CH₄ (g); Δ_rH = x kJ mol^–1

(b) C (graphite, s) + 2H₂ (g) → CH₄ (g); Δ_rH = y kJ mol^–1

Question

Philoid · Accepted Answer

Reason: Same bonds are formed in both the reaction but in the second reaction there is breaking of bond take place in which energy is absorbed.

Consider the reactions given below. On the basis of these reactions find out which of the algebric relations given in options (I) to (iv) is correct?(a) C (g) + 4 H (g) → CH4 (g); ΔrH = x kJ mol–1(b) C (graphite, s) + 2H2 (g) → CH4 (g); ΔrH = y kJ mol–1