Question

Determine which of the following reactions taking place at constant pressure represents
system that do work on the surrounding environment
I. Ag + (aq) + Cl (aq) - AgCl(s)
II. NH4Cl(s) - NH3(g) + HCl(g)
III. 2NH3(g) - N2(g) + 3H2(g)
(a) I
(b) III
(C) II and III
(d) I and II​

Answer 1

In equation Ag

+

(ag)+Cl(ag)⟶AgCl(5).

No species is in gaseous state, so the reaction will take place at constant pressure.

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