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The change in enthalpy of the reaction 2...

The change in enthalpy of the reaction `2P(s)+3Br_(2)(l)rarr2PBr_(3)(l)` is `-354(kJ)/(mol)`. In this reaction, if the amount of phosphorous consumed is `3.1g`, the change in enthalpy is ____ `kJ`. [Atomic weight of `P=31`]

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