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When 0.409 g of sodium metal is added to an excess of hydrochloric acid, 4250 J of heat are produced what is the enthalphy of

When 0.409 g of sodium metal is added to an excess of hydrochloric acid, 4250 J of heat are produced

what is the enthalphy of The reaction as written?

2 Na(s) + 2 HC|(aq) - 2 NaC|(aq) + H, (g)

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