When 0.490 g of sodium metal is added to an excess of hydrochloric acid, 5090 J of heat are produced. What is the e...

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Answer 1

Answer #1

Moles of Na = mass of Na / molar mass = 0.49 / 23 = 2.13 * 10^-2 moles

Energy released per moles of Na reacted = Energy released / number of moles = 5090 / (2.13 * 10^-2) = 2.39 * 10⁵ J / mol

Eenrgy released in the given equation = Number of moles of Na * Energy released per mole of Na = 2 * 2.39 * 10⁵ J = 478 KJ

Answer 2

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