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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Chemical Equilibrium

NTA Abhyas 2020 · Chemistry · Chemical Equilibrium

Acetic acid ( C H _ 3 COOH ) is partially dimerised to (C H _ 3...

Acetic acid ( CH3COOHC{H}_{3}COOH ) is partially dimerised to (CH3 COOH ){\left(C{H}_{3}\text{ COOH }\right)}_{2}inthevapourphase.Atatotalpressureofin the vapour phase. At a total pressure of\text{0}\text{.200}\text{atm},aceticacidis, acetic acid is\text{92}\text{.0%}dimerizedatdimerized at\text{298}\text{K}. The value of equilibrium constant of dimerization under these conditions isAcetic acid ( C H _ 3 COOH ) is partially dimerised to (C H _ 3 COOH ) _ 2 in the vapour phase. At a total pressure of

Options

  1. A57.5{\text{atm}^{- 1}
  2. B9.7{\text{atm}^{- 1}
  3. C97{\text{atm}^{- 1}
  4. D\text{194}{\text{atm}^{- \text{1}}

Correct answer

D. \text{194}{\text{atm}^{- \text{1}}

Step-by-step solution

Acetic acid ( C H _ 3 COOH ) is partially dimerised to (C H _ 3 COOH ) _ 2 in the vapour phase. At a total pressure of
According to question; 0.46a+0.08a=0.2\text{0}\text{.46}\text{a}\text{+}\text{0}\text{.08}\text{a}\text{=}\text{0}\text{.2}
∴a=0.20.54∴ \text{a}\text{=}\dfrac{0.2}{0.54}
KP=(0.46×0.20.54)(0.08×0.20.54)2{K}_{P} = \dfrac{\left(0.46 \times \dfrac{0.2}{0.54}\right)}{{\left(0.08 \times \dfrac{0.2}{0.54}\right)}^{2}}
\text{=194}{\text{atm}^{- \text{1}}
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