Question

Formation of $ClF_3$ from $Cl_2$ and $F_2$ is an exothermic process. The equilibrium system can be represented as ${Cl2_{(g)} +3F2_{(g)}<=>2ClF3}$ ; $\Delta H=-329\,kj\,mol^{-1}$ Which of the following will increase quantity of $ClF_3$ in the equilibrium mixture?

• A. Increase in temperature, decrease in pressure, addition of $Cl_2$
• B. Decrease in temperature and pressure, addition of $ClF_3$
• C. Increase in temperature and pressure, removal of $Cl_2$
• D. Decrease in temperature, increase in pressure, addition of $F_2$

Answer 1

Answer: (D)

Decrease in temperature, increase in pressure, addition of $F_2$

Answer 2

Exothermic reaction, decrease in number of moles, increase in concentration of reactants.