1. If the bond energy for the NN bond is 946 kJ/mol , how much energy is...

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1. If the bond energy for the $N \equiv N$ bond is 946 $k J / m o l$ , how much energy is needed to break all the bonds in 2.5 $m o l$ of nitrogen molecules?

2. If the bond energy for the $H - H$ bond is 432 $k J / m o l$ , how much energy is needed to break all the bonds in 7.5 hydrogen gas?

3. If the bond energy for the $N = H$ bond is 391 $k J / m o l$ , how much energy is released when 2.5 $m o l$ ammonia gas is formed?

4. What is the net result of energy needed to break the bonds, less the energy released when new bonds are formed?

5. How do you interpret the sign of the answer?

The reaction is endothermic.

b. . The reaction is exothermic

Related Book For answer-question

Physics Principles with Applications

ISBN: 978-0321762429

7th edition

Authors: Douglas C. Giancoli

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Posted Date: May 04, 2020 01:22 PM

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1. If the bond energy for the NN bond is 946 kJ/mol , how much energy is...

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