The equation alpha = frac{D - d}{(n - 1)d} re | vedclass

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

Question

(B) The general formula for the degree of dissociation $\alpha$ is given by $\alpha = \frac{D - d}{(n - 1)d}$,where $n$ is the total number of moles o

Vedclass · Accepted Answer

$A \rightleftharpoons \frac{nB}{2} + \left( \frac{2n}{3} \right)C$

Vedclass · Answer

(B) The general formula for the degree of dissociation $\alpha$ is given by $\alpha = \frac{D - d}{(n - 1)d}$,where $n$ is the total number of moles of products formed from $1$ mole of reactant.For the reaction $A \rightleftharpoons xB + yC$,the total number of moles of products is $n = x + y$.Substituting $n = x + y$ into the formula,we get $\alpha = \frac{D - d}{(x + y - 1)d}$.Checking option $B$: $A \rightleftharpoons \frac{n}{3}B + \frac{2n}{3}C$.Here,the sum of stoichiometric coefficients is $x + y = \frac{n}{3} + \frac{2n}{3} = \frac{3n}{3} = n$.Substituting this into the denominator $(x + y - 1)$,we get $(n - 1)$,which matches the given equation.

The equation $\alpha = \frac{D - d}{(n - 1)d}$ represents the degree of dissociation. For which of the following reactions is this equation valid,where $D$ is the theoretical vapour density and $d$ is the observed vapour density?

Similar Questions

$A$ gas has the formula $[CO]_x$. If its vapor density is $70$,what is the value of $x$?

For the equations $(i) \ HCN + CCl_4 \rightarrow \alpha_1$ and $(ii) \ HCN + C_6H_6 \rightarrow \alpha_2$,which degree of dissociation is greater,$\alpha_1$ or $\alpha_2$?

At $200 \, ^\circ C$,the observed vapour density $(V.D.)$ of $PCl_5$ is $60$. The degree of dissociation $(\alpha)$ of $PCl_5$ is ..........$\%$ (Given: Molar mass of $PCl_5 = 208.5 \, g/mol$).

$3.2 \text{ moles of hydrogen iodide are heated in a closed vessel at } 444^{\circ}C \text{ until equilibrium is reached. If the degree of dissociation at this temperature is } 22\%, \text{ then the number of moles of hydrogen iodide remaining at equilibrium will be:}$

What is the vapor density of a mixture containing $20\%\, NO_2$ by volume and $N_2O_4$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module