At higher altitude,the boiling point of water | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The elevation in boiling point is given by $\Delta T_b = T_b - T_b^0 = 100\, ^oC - 95\, ^oC = 5\, K$. For $NaCl$,the van't Hoff factor $i = 1 + \a

Vedclass · Accepted Answer

$296.05$

Vedclass · Answer

(A) The elevation in boiling point is given by $\Delta T_b = T_b - T_b^0 = 100\, ^oC - 95\, ^oC = 5\, K$. For $NaCl$,the van't Hoff factor $i = 1 + \alpha(n-1)$. Since $NaCl$ dissociates into $2$ ions $(n=2)$ and $\alpha = 0.9$,$i = 1 + 0.9(2-1) = 1.9$. The formula for elevation in boiling point is $\Delta T_b = i 	imes K_b 	imes m$,where $m$ is the molality. $m = \frac{	ext{moles of solute}}{	ext{mass of solvent in kg}} = \frac{w / 58.5}{1} = \frac{w}{58.5}$. Substituting the values: $5 = 1.9 	imes 0.52 	imes \frac{w}{58.5}$. $w = \frac{5 	imes 58.5}{1.9 	imes 0.52} = \frac{292.5}{0.988} \approx 296.05\, g$.

$(a)$ Clostridium butylicum	$(i)$ Cyclosporin-$A$
$(b)$ Trichoderma polysporum	$(ii)$ Butyric acid
$(c)$ Monascus purpureus	$(iii)$ Citric acid
$(d)$ Aspergillus niger	$(iv)$ Blood cholesterol lowering agent

At higher altitude,the boiling point of water is $95\, ^oC$. The amount of $NaCl$ added to $1\, kg$ of water $(K_b = 0.52\, K\, kg\, mol^{-1})$ in order to raise the boiling point of the solution to $100\, ^oC$ (assuming $90\%$ ionization of $NaCl$) is .......... $g$.

Similar Questions

The dipole moment order of which of the following pairs of molecules is $NOT$ correct?

If $\frac{1}{2} \leq x \leq 1$,then $\cos ^{-1} x+\cos ^{-1}\left(\frac{x}{2}+\frac{1}{2} \sqrt{3-3 x^2}\right)$ is equal to

What is a phycobiont?

$A$ transistor is connected in common emitter $(CE)$ configuration. The collector supply is $8 \ V$ and the voltage drop across a resistor of $800 \ \Omega$ in the collector circuit is $0.5 \ V$. If the current gain factor $\alpha$ is $0.96$,find the base current in $\mu A$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module