1.

Consdier the following energy level diagram: The quantity y is equal to

Answer»

`Delta H_("combustion "C(s)) + Delta H_("combustion"H_(2)(g))`
`X + z`
`x-z`
`Delta H_(fCO_(2)) + Delta H_(H_(2)O)`

Solution :As per HESS LAW `x + z = y`


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