Help me with this, just question 2,3

Question 2

Step 1: Consider statement a): Reversible reaction never completes in both directions.

This provides incorrect information. Reversible reactions reach dynamic equilibrium in closed systems but can be driven to completion in one direction by removing products continuously (e.g., distillation or precipitation), according to Le Chatelier's principle.

Step 2: Consider statement b): Reversible reaction usually occurs in a closed system to prevent escape of reactants or products.

This is correct, as a closed system is required to establish and maintain dynamic equilibrium.

\textbf{a}

Question 3

The reaction is: $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g) \quad \Delta H = -92~kJ$

4 moles of gas on left, 2 moles on right. Exothermic.

Step 1: a) Increasing