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Classification of Hydrocarbons

Which of the ...

Question

Which of the following has highest Henry's constant value at 298 K A) HCHO B) CO2(carbon dioxide) C) CH4(methane) D) 1-chloroethene How to find out Henry's constant value for different compounds?

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Solution

Carbondioxide is having higher Henry's constant, as the solubility of carbondioxide is more.
Partial pressure = K_H X
K_H = Partial pressure / X
As the enthalpy of dissolution of carbondioxide is more (2400 kJ/ mol), the Henry's constant is more.

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