If D_T and D_0 are the theoretical and observ | vedclass

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

Question

(C) Consider the dissociation reaction: $A \rightleftharpoons nB$
Initial moles: $1 \quad 0$
Moles at equilibrium: $1 - \alpha \quad n\alpha$
Total

Vedclass · Accepted Answer

$\alpha = \frac{D_T - D_0}{(n - 1)D_0}$

Vedclass · Answer

(C) Consider the dissociation reaction: $A ightleftharpoons nB$
Initial moles: $1 \quad 0$
Moles at equilibrium: $1 - \alpha \quad n\alpha$
Total moles at equilibrium: $1 - \alpha + n\alpha = 1 + \alpha(n - 1)$
Since vapour density is inversely proportional to the number of moles,we have: $\frac{D_T}{D_0} = \frac{	ext{Total moles at equilibrium}}{	ext{Initial moles}} = \frac{1 + \alpha(n - 1)}{1}$
Rearranging for $\alpha$: $\frac{D_T}{D_0} = 1 + \alpha(n - 1)$
$\frac{D_T}{D_0} - 1 = \alpha(n - 1)$
$\frac{D_T - D_0}{D_0} = \alpha(n - 1)$
$\alpha = \frac{D_T - D_0}{(n - 1)D_0}$

If $D_T$ and $D_0$ are the theoretical and observed vapour densities at a definite temperature and $\alpha$ is the degree of dissociation of a substance,then $\alpha$ in terms of $D_0, D_T$ and $n$ (number of moles of product formed from $1 \, \text{mole}$ of reactant) is calculated by the formula:

Similar Questions

Total number of moles for the reaction $2HI \rightleftharpoons H_2 + I_2$ at equilibrium,if $\alpha$ is the degree of dissociation,is:

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 $\alpha_2$?

The vapour density of a mixture containing $NO_2$ and $N_2O_4$ is $27.6$. The mole fraction of $N_2O_4$ in the mixture is

For completely dissociated $NH_4Cl$,the vapour density is ........

$A$ $1 \ L$ vessel contains $2 \ moles$ of $PCl_5$ initially. If $K_c$ is found to be $1$,the degree of dissociation of $PCl_5$ for the reaction $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module