Consider the reactions given below. On the basis of these reactions find out which of the algebric relations given in options (a) to (d) is correct ? (i) C_((g))+4H_((g))rarrCH_(4(g)),Delta_(r)H=x" kJ mol"^(-1) (ii) C_("(graphite, s)")+2H_(2(g))rarrCH_(4(g)),Delta_(r)H="y kJ mol"^(-1)

Consider the reactions given below. On the basis of these reactions fi

1.	Consider the reactions given below. On the basis of these reactions find out which of the algebric relations given in options (a) to (d) is correct ? (i) C_((g))+4H_((g))rarrCH_(4(g)),Delta_(r)H=x" kJ mol"^(-1) (ii) C_("(graphite, s)")+2H_(2(g))rarrCH_(4(g)),Delta_(r)H="y kJ mol"^(-1)
Answer» x = y x = 2y x gt y x lt y Solution :In eqn (i), no BOND is being broken while in eqn (ii), 2 H - H bonds are broken. So, in eqn (ii) some of the ENERGY is used up to BREAK the bonds.Thus, `x gt y`.