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?
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) + 4H(g) → CH4 (g); ΔrH = x kJ mol–1
(b) C (graphite,s) + 2H2 (g) → CH4 (g); ΔrH = y kJ mol–1
(i) x = y
(ii) x = 2y
(iii) x > y
(iv) x < y
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(iii)
Justification : Same bonds are formed in reaction (a) and (b) but bonds between reactant molecules are broken only in reaction (b).
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