NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- Chemical Equilibrium
NTA Abhyas 2020 · Chemistry · Chemical Equilibrium
Consider the atomization of Br_ 2 (g) according to the reaction :...
Consider the atomization of Br_{2}(g) according to the reaction : If the heat of atomization of bromine gas is 82 KJ/mol ; standard molar entropies of Br(g) and Br_{2}(g) are 175 and 245.4 JK^{-1} respectively, calculate degree of dissociation when the total pressure is 40 atm at 500 K. (assume
Options
- A
- B
- C
- D
Correct answer
A.
Step-by-step solution
For
= 2 9 \cdot2 \times1 {0}^{3} \text{J} = - \text{RT} \text\ln {K}_{P}
\text\ln {K}_{P} = \dfrac{- 2 9 7 0 0}{8 \cdot 3 1 4 \times 5 0 0} = -7.02
∴ 9 \times {10}^{- 4} =4 ⋅ {α}^{2} ⋅ 40∴ {α}^{2} = \dfrac{9}{160} \times {10}^{- 4}<br />=\dfrac{9}{16}$ \times {10}^{- 5}
$= 2.37 \times {10}^{- 3}
= 2 9 \cdot2 \times1 {0}^{3} \text{J} = - \text{RT} \text\ln {K}_{P}
\text\ln {K}_{P} = \dfrac{- 2 9 7 0 0}{8 \cdot 3 1 4 \times 5 0 0} = -7.02
∴ 9 \times {10}^{- 4} =4 ⋅ {α}^{2} ⋅ 40∴ {α}^{2} = \dfrac{9}{160} \times {10}^{- 4}<br />=\dfrac{9}{16}$ \times {10}^{- 5}
$= 2.37 \times {10}^{- 3}