Question

Formation of $C l F_3$ from $C l_2$ and $F_2$ is an exothermic process. The equilibrium system can be represented as $Cl _{2( g )}+3 F _{2( g )} \rightleftharpoons 2 ClF _3 ; \Delta H=-329$ 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)

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