1.

3.0 moles of PCl_5 kept in 1 L closed reaction vesselwas allowed to attain equilibrium at 380 K. The composition of the mixture i.e., PCl_5 and PCl_3 respectively at equilibrium is (K_c = 1.80)

Answer»

1.71,2.25
1.59, 1.61
1.41,1.59
1.41, 1.41

Solution :`{:(,PCl_(5(g)) hArr , PCl_(3(g)) + , Cl_(2(g))), ("Initial CONC. (mol/L)", 3.0 , 0,0),("At equilibrium" , 3-X, x ,x ) :}`
`K_c=x^2/(3-x)=1.8 RARR x=1.59`
Conc. Of `PCl_3` at equilibrium = 1.59
Conc. Of `PCl_5` at equilibrium = 3-1.59 = 1.41


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