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Choose the correct statement with respect to the vapour pressure of a liquid among the following :

Options

  1. AIncreases non-linearly with increasing temperature
  2. BDecreases non-linearly with increasing temperature
  3. CDecreases linearly with increasing temperature
  4. DIncreases linearly with increasing temperature

Correct answer

A. Increases non-linearly with increasing temperature

Step-by-step solution

The pressure exerted by the vapors over the liquid surface when liquid and vapour are in equilibrium is called vapour pressure. Vapour pressure increases with an increase with temperature. Average kinetic energy of the gas molecules is directly proportional to the absolute temperature. At higher temperatures, more molecules from the liquid have enough KE to escape from the surface of the liquid. Which will increase vapor pressure. For phase equilibrium for liquid & vapour phases dP dT = Δ S Δ V = Δ H

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