Jorstice B.

asked • 11/24/14

Chemistry, How do I figure this out?

When you add 0.205 g of sodium metal to an excess of hydrochloric acid, you find that 2130 J of heat are produced. What is the enthalpy of the reaction as written below?
                                            2Na(s)+2HCl(aq)-->2NaCl(aq)+H2(g)
 
Enthalpy Of Reaction: In kJ?

1 Expert Answer

By:

Francisco P. answered • 11/24/14

Rigorous Physics and Math Tutor

Jorstice B.

Thank you for the answer!
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12/02/14

Alyssa F.

Since the coefficient of Sodium in the equation is 2, you actually have to double your answer. You did it based off of 1, which would be correct if that was the coefficient but the correct answer is -477.6 kJ.
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10/23/17

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