Benzene and toluene forms nearly an ideal solution. At 300 K, P_("toluene")^(@)=32.06" mm" and P_("benzene")^(@)=103.01" mm" (of Hg) (i) A liquid mixture is conposed of 3 mole of tolune and 2 mole of benzene. If the pressure over the mixture at 300 K is reduced, at what pressure does the first vapour form ? (ii) What is the composition of the first trace of vapour formed ? (iii) If the pressure is reduced futher,at what pressure does the last trace of liquid dissappear ? (iv) What is the composition of last trace of liquid ?

Benzene and toluene forms nearly an ideal solution. At 300 K, P_("tolu

1.	Benzene and toluene forms nearly an ideal solution. At 300 K, P_("toluene")^(@)=32.06" mm" and P_("benzene")^(@)=103.01" mm" (of Hg) (i) A liquid mixture is conposed of 3 mole of tolune and 2 mole of benzene. If the pressure over the mixture at 300 K is reduced, at what pressure does the first vapour form ? (ii) What is the composition of the first trace of vapour formed ? (iii) If the pressure is reduced futher,at what pressure does the last trace of liquid dissappear ? (iv) What is the composition of last trace of liquid ?
Answer» (i)50.44mmg (II)x_("toluene")=0.3181 (iii) P=46.28mmhg (IV) x_("toluene")=0.852 (i)P=42.44mmhg (ii)x_("toluene")=0.786 (iii) P=38.23mmhg (iv) x_("toluene")=0.879 (i) 60.44 mm Hg (ii) `x_("toluene")=0.3181` (iii) P=44.25 MMHG (iv)`x_("toluene")=0.8281` (i) 74.44 mm Hg (ii) `x_("toluene")=0.218` (iii) P=32.33 mmHg (iv)`x_("toluene")=0.9281` Solution :(i) 60.44 mm Hg (ii) `x_("toluene")=0.3181` (iii) P=44.25 mmHg (iv)`x_("toluene")=0.8281`