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0.04 mole of a reactive metal is dropped into a 2000g of water, initially at 20oC....

0.04 mole of a reactive metal is dropped into a 2000g of water, initially at 20oC. A chemical reaction occurred! It was found that, in the end, the temperature of water increased by 2.5oC.Calculate the ΔHrxnper moleof metal.*for simplicity don’t put the heat capacity of metal into calculation.

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