1. Tardigrade
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  3. Chemistry
  4. A mixture of toluene and benzene forms a nearly ideal solution. Assume P B ° and P T ° to be the vapor pressures of pure benzene and toluene, respectively. The slope of the line obtained by plotting the total vapor pressure to the mole fraction of benzene is :-

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Q. A mixture of toluene and benzene forms a nearly ideal solution. Assume $P _{ B }^{\circ}$ and $P _{ T }^{\circ}$ to be the vapor pressures of pure benzene and toluene, respectively. The slope of the line obtained by plotting the total vapor pressure to the mole fraction of benzene is :-

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Solution:

$P _{\text {total }}=\chi_{ B }\left( P _{ B }^{0}\right)+\chi_{ T }\left( P _{ T }^{0}\right)$
$=\chi_{ B }\left( P _{ B }^{0}\right)+\left(1-\chi_{ B }\right)\left( P _{ T }^{0}\right)$
Comparing it with $y = mx + c$
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