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Consider the reaction at 300 K H(2)(g)...

Consider the reaction at `300 K`
`H_(2)(g)+Cl_(2)(g)rarr2HCl(g), " "DeltaH^(@)= -185kJ`
If `2` mole of `H_(2)` completely react with `2` mole of `Cl_(2)` to form `HCl`. What is `DeltaU^(@)` for this reaction?

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