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Reaction ( i ) will have greater value of ∆H because when H2O ( g ) condenses to form H2O ( l ), some heat is evolved ( called heat of condensation)
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reaction one will have higher h2 value that is because in the 1 st reaction h2 and o2 combines to give h2o which is water where it is a liquid where atoms in a liquid are closely packed to each other. whereas in 2 nd reaction h2o is formed in the gaseous form where atoms are not closely packed and has less force of attraction between atoms.
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