1. Tardigrade
  2. Question
  3. Chemistry
  4. 'a’ moles of PCl5, undergoes, thermal dissociation as: PCl5 leftharpoons PCl3 + Cl2, the mole fraction of PCl3 at equilibrium is 0.25 and the total pressure is 2.0 atmosphere. The partial pressure of Cl2 at equilibrium is:

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Q. $'a’$ moles of $PCl_{5}$, undergoes, thermal dissociation as: $PCl_{5} \rightleftharpoons PCl_{3} + Cl_{2},$ the mole fraction of $PCl_{3}$ at equilibrium is $0.25$ and the total pressure is $2.0$ atmosphere. The partial pressure of $Cl_{2}$ at equilibrium is:

Equilibrium

Solution:

$\underset{\overset{at t=0}{t=tq}}{}\,\,\, \underset{\overset{a}{a-x}}{PCl_{5}} \rightleftharpoons \underset{\overset{0}{x}}{PCl_{3}} +\underset{\overset{0}{x}}{Cl_{2}}$
$P_{pcl_{3}} =X_{Pcl_{3}} \times P_{T}= 0.25 \times 2=0.5$ atm
$P_{PCl_{3}} =P_{Cl_{2}} =0.5$ atm