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| 1. |
3*00 " mol of " PCl_(5) kept in 1 L closed reaction vessel was allowed to attain equilibrium at 380 K. Calculate the composititon of the mixture at equilibrium . K_(c) = 1* 80 |
| Answer» <html><body><p></p>Solution :` {:(,PCl_(5)(g),hArr,PCl_(3)(g),+,Cl_(2)(g)),("Initial",3*<a href="https://interviewquestions.tuteehub.com/tag/00-254995" style="font-weight:bold;" target="_blank" title="Click to know more about 00">00</a> " mol ",,0,,0),("At. eqm.",(3*0-<a href="https://interviewquestions.tuteehub.com/tag/x-746616" style="font-weight:bold;" target="_blank" title="Click to know more about X">X</a>)"mol",,x " mol",,x" mol "),("Molar conc",(3*0-x),,x,,x):}` (as volume of <a href="https://interviewquestions.tuteehub.com/tag/vessel-1445872" style="font-weight:bold;" target="_blank" title="Click to know more about VESSEL">VESSEL</a> = 1 L) <br/> ` K_(c) = ([PC_(3)] [Cl_(2)])/([PC_(5)])`<br/> ` 1*80 = (x xxx)/(3-x)=x^(2)/(3-x)or x^(2) = 5*<a href="https://interviewquestions.tuteehub.com/tag/40-314386" style="font-weight:bold;" target="_blank" title="Click to know more about 40">40</a> - 1*80 x or x^(2) + 1*80 x - 5* 40=0` <br/>` :. x= (-bpm sqrt(b^(2) - 4ac))/(2a)=(-1*80 pm sqrt((1*80)^(2) - 4 (-5*40)))/2=1*59`(neglecting - ve value) <br/> `:. " AT. equilibrium",[PCl_(5)]=3- 1*59 = 1*41 M` <br/> ` [PCl_(3)] = [Cl_(2)] = 1*59 M `</body></html> | |