On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressure of the two liquid components ( heptane and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of the solution obtained by mixing 25.0 g of heptane and 35 g of octane will be ( molar mass of heptane = 100 "g mol"^(-1) and of octane = 114 "g mol"^(-1) ):

On mixing, heptane and octane form an ideal solution. At 373 K, the va

1.	On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressure of the two liquid components ( heptane and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of the solution obtained by mixing 25.0 g of heptane and 35 g of octane will be ( molar mass of heptane = 100 "g mol"^(-1) and of octane = 114 "g mol"^(-1) ):
Answer» 96.2 KPA 144.5 kPa 72.0 kPa 36.1 kPa Solution :`n_(H)=0.307` `x_(h)=(0.25)/(0.25 + 0.307)=0.45` `:.x_(0)=1-0.45=0.55` `p=x_(h)p_(h)^(@)+x_(o)p_(o)^(@)` `=0.45xx105+0.55xx45` `=47.25+24.75=72` kPa