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H(2)(g)+(1)/(2)O(2)(g)rarrH(2)O(l), Delt...

`H_(2)(g)+(1)/(2)O_(2)(g)rarrH_(2)O(l), DeltaH =- 286 kJ`
`2H_(2)(g)+O_(2)(g)rarr2H_(2)O(l)……………kJ(+-?)`

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