Question

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) \[\ce{C (g) + 4 H (g) -> CH4 (g); ∆_rH = xkJ mol^{-1}}\]

(b) \[\ce{C (graphic) + 2H2 (g) -> CH4 (g); ∆_rH = ykJ mol^{-1}}\]

Options

• x = y

• x = 2y

• x > y

• x < y

Answer 1

x > y

Explanation:

Same bonds are formed in reaction (a) and (b) but bonds between the reactant molecules are broken only in reaction (b).