Equal masses of ethyne (C_2H_2) and benzene ( | vedclass

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

Question

(C) Let the mass of both ethyne $(C_2H_2)$ and benzene $(C_6H_6)$ be $w \ g$.Molar mass of ethyne $(C_2H_2) = 2 	imes 12 + 2 	imes 1 = 26 \ g/mol$.M

Vedclass · Accepted Answer

$2400$

Vedclass · Answer

(C) Let the mass of both ethyne $(C_2H_2)$ and benzene $(C_6H_6)$ be $w \ g$.Molar mass of ethyne $(C_2H_2) = 2 	imes 12 + 2 	imes 1 = 26 \ g/mol$.Molar mass of benzene $(C_6H_6) = 6 	imes 12 + 6 	imes 1 = 78 \ g/mol$.Number of moles of ethyne $(n_1) = w/26$.Number of moles of benzene $(n_2) = w/78$.Partial pressure is proportional to the number of moles $(P \propto n)$ at constant volume and temperature.$P_{ethyne} / P_{benzene} = n_1 / n_2 = (w/26) / (w/78) = 78 / 26 = 3$.So,$P_{ethyne} = 3 	imes P_{benzene} = 3 	imes 600 \ torr = 1800 \ torr$.Total pressure $(P_{total}) = P_{ethyne} + P_{benzene} = 1800 \ torr + 600 \ torr = 2400 \ torr$.

Equal masses of ethyne $(C_2H_2)$ and benzene $(C_6H_6)$ are taken in a flask at $400 \ K$. If the partial pressure of benzene is $600 \ torr$,what will be the total pressure of the gaseous mixture in $torr$?

Similar Questions

At $300 \ K$ and $760 \ torr$ pressure, the density of a mixture of $He$ and $O_2$ gases is $0.543 \ g \ L^{-1}$. The mass percent of oxygen is approximately $(R = 0.0821 \ L \ atm \ K^{-1} \ mol^{-1})$

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

Assertion: Use of pressure cooker reduces cooking time.
Reason: At higher pressure,cooking occurs faster.

At $STP$,$0.50 \ mol$ $H_2$ gas and $1.0 \ mol$ $He$ gas:

The density of a mixture of $He$ and $O_2$ gases at $27\,^{\circ}C$ and $760\, torr$ pressure is $0.543\, g\, dm^{-3}$. Calculate the percentage by mass of $He$ in the mixture.

Vedclass Test Series

Exam Paper Generator

Online Exam Module