At constant pressure, which of these systems do work on the surroundings? A ( s ) + B ( s ) ⟶ C ( g ) A(s)+B(s)⟶C(g) 2 A ( g ) + 2 B ( g ) ⟶ 5 C ( g ) 2A(g)+2B(g)⟶5C(g) A ( g ) + B ( g ) ⟶ C ( g ) A(g)+B(g)⟶C(g) 2 A ( g ) + 2 B ( g ) ⟶ 3 C ( g )

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.

The answer would be solvent