Equilibrium Question 725
Question: ‘a’ moles of $ PCl_5 $ , undergoes, thermal dissociation as: $ PCl_5 \leftrightharpoons 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 $ CI_2 $ at equilibrium is:
Options:
A) 2.5
B) 1.0
C) 0.5
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
$ PCl_5\rightarrow PCl_3+Cl_2 $
| $ at t=0 $ | $ a $ | $ 0 $ | $ 0 $ |
| $ t=tq $ | $ a-x $ | $ x $ | $ x $ |
$ {P_{PCl_3}}={X_{PCl_3}}\times P_{T}=0.25\times 2=0.5atm $
$ {P_{PCl_3}}={P_{Cl_2}}=0.5atm $
