passwella.
Menu

JAMB Chemistry 2005 Question 41

Question 41

Chemical Equilibrium

NH4Cl(s) ⇌ NH3(g) + HCl(g)
The reaction above can only attain equilibrium if

  1. A.a gaseous reactant is added
  2. B.one of the products is removed
  3. C.it is in a closed system
  4. D.it is in an open system
Show the answer and explanation

Answer: C (it is in a closed system)

Explanation

Equilibrium needs both forward and reverse reactions; in an open system the gaseous products escape, so it can only be reached in a closed system.