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Consider the reactions given below .On t...

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`

Text Solution

Verified by Experts

The correct Answer is:
c
Same bonds are formed in reaction (i) and(ii) but not bounds are broken in reaction (i) whereas bondsin the reactant molecules are broken in reaction (ii) . As energy is abosrbed when bondsare broken, energy released in reaction (i) is greater than that in reaction (ii) ,i.e., `x gty `.
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