Q.

If bond energy of N-H bond is x cal mol-1, change in internal energy in the following chemical process is NH3(g)⟶N(g)+3H(g)

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a

x cal

b

4x cal

c

3x cal

d

2x cal

answer is C.

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Detailed Solution

There are three N-H bonds in NH3 hence, change in internal energy = 3x.
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If bond energy of N-H bond is x cal mol-1, change in internal energy in the following chemical process is NH3(g)⟶N(g)+3H(g)