If 18 g of glucose is added to 180 g of water at $100^{\circ} C$, the vapour pressure of the resulti

Question

If 18 g of glucose is added to 180 g of water at $100^{\circ} C$, the vapour pressure of the resulting solution at $100^{\circ} C$ is

Professor PC Thomas Classes · Answer

$\frac{p_{1}^{0}-p_{1}}{P_{1}^{0}}=\chi_{2}=\frac{n_{2}}{n_{1}+n_{2}} \approx \frac{n_{2}}{n_{1}} =\frac{w_{2} / M_{2}}{w_{1} / M_{1}}=\frac{w_{2}}{M_{2}} \frac{M_{1}}{w_{1}} =\frac{18 	imes 18}{180 	imes 180}=0.01 p_{1}^{0}-p_{1}=p_{1}^{0} \chi_{2} p_{1}=p_{1}^{0}-p_{1}^{0} \chi_{2} p_{1}=760-(760 	imes 0.01)=(760-7.6)=752.4 mm$