Determine which of the following reactions taking place at constant pressure represents a system that does work on the surrounding environment.
I. $A g^{+} (a q) + C l^{-} (a q) \to A g C l (s)$
II. $N H_{4} C l (s) \to N H_{3} (g) + H C l (g)$
III. $2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)$

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III

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II and III

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I and II

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Solution

The correct option is A I
In equation $A g^{+} (a g) + C l (a g) ⟶ A g C l (5) .$
No species is in gaseous state, so the reaction will take place at constant pressure.

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Similar questions

{A g}^{+} (a q) + {C I}^{-} (a q) ⟶ A g C I (s)

{N H}_{4} C I (s) ⟶ {N H}_{3} (g) + H C I (g)

2 {N H}_{3} (g) ⟶ N_{2} (g) + 3 H_{2} (g)

A g (a q) + C l (a q) \to A g C l (s)

N H_{4} C l (s) \to N H_{3} (g) + H C l (g)

2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)

I . A g^{+} (a q) + C l^{-} (a q) \to A g C l (s)

I I . N H_{4} C l (s) \to N H_{3} (g) + H C l (g)

I I I . 2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)

I . A g^{+} (a q) + C l^{-} (a q) \to A g C l (s)

I I . N H_{4} C l (s) \to N H_{3} (g) + H C l (g)

I I I . 2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)

3 H_{2} (g) + N_{2} (g) \to 2 N H_{3} (g)

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