1.

`1*5` moles of `PCl_(5)` are heated at constant temperature in a closed vessel of 4 litre capacity. At the equilibrium point, `PCl_(5)" is "35 % " dissociated into " PCl_(3) and Cl_(2).` Calculate the equilibrium constant.

Answer» Correct Answer - `0*071`
`{:(,PCl_(5),hArr,PCl_(3),+,Cl_(2)),("Intial moles",1*5,,,,),("At. eqm.",(1*5 xx 35/100 xx 1*5),,,,),(,=1*5 - 0*525=0*975,,0*525,,0*525),(" Molar cons.",0*975//4,,0*525//4,,0*525 //4):}`
`K_(c) = (( 0* 525 // 4) (0*525//4))/((0*975 //4))=0*071`


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