Ammonia Chemical Bonding Worksheet Page 9
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28(iii)
Which one of the following metals is most likely to be a catalyst for this process?
Draw a ring around your answer.
aluminium
lead
magnesium
nickel
sodium
Give a reason for your choice.
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(1)
(b)
A second stage in this process is represented by this equation.
(i)
Use the bond energies given in the table to help you to calculate the nett energy
transfer (energy change) for this reaction.
Bond
Bond energy in kJ/mol
1077
C ≡ O
C = O
805
H – H
436
O – H
464
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Nett energy transfer = ...................................... kJ/mol
(3)
Page 9 of 28
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