1.

Consider the reactions given below .On the basis of these reactions ,Find out which of the algebraic relations given in options (a) to(d) is correct? `(p)C(g)+4H(g)toCH_(4)(g), Delta_(r)H=xKJ mol^(-1)` `(Q)C("graphite")+2H_(2)(g)to CH_(4)(g),` `Delta_(r)H=yKJmol^(-1)`A. `x=y`B. `x=2y`C. `x gt y`D. `x lt y`

Answer» Correct Answer - C
`x gr y` because same bonds are formed in reactions (i) and (ii) but bonds between reactant molecules are broken, only in reactions (ii). As energy is absorbed when bonds are broken energy released in reaction (i) is greater than in reaction (ii)


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