7. Which of the following reactions would have a positive value f I. NH3(g) + HCl(g)...

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Answer 1

Answer #1

QUESTION NUMBER 7:

For given question option (e) is write answer.

Solid $\rightarrow$ liquid $\rightarrow$ gas disorderness increases by this entropy also increases.

For a chemical Change

If $\Delta$ n_g 0 then $\Delta$ S 0 Positive i.e entropy of the system increases
If $\Delta$ n_g 0 then $\Delta$ S 0 Negative i.e entropy of the system decreases
$\Delta$ n_g Total number of moles of gaseous products - Total number of moles of gaseous reactents.
In the given options
for first three options $\Delta$ n_g 0 then $\Delta$ S 0 Negative
for fourth option $\Delta$ n_g 0 But no f liquid molecules are increased thats why disorderness increases and $\Delta$ S positive
for fifth option $\Delta$ n_g 0 then $\Delta$ S 0 Positive i.e entropy of the system increases

Answer 2

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