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Concepts Of Physics MCQ Edition [Volume 2]PhysicsKinetic Theory of Gases

The average temperature of the human body is 98 ^ F . Assuming that the vapour pressure of the blood in the veins behaves like that of pure water, determine the minimum atmospheric pressure required to prevent the blood from boiling. Use the appropriate vapour pressure graph for water.

Options

  1. A100 mm Hg
  2. B76 mm Hg
  3. C98 mm Hg
  4. D50 mm Hg

Correct answer

D. 50 mm Hg

Step-by-step solution

The temperature of the human body is given as 98^ F . Converting this temperature to the Celsius scale: T(^ C ) = 5 9 (T(^ F ) - 32) T(^ C ) = 5 9 (98 - 32) = 5 9 (66) = 36.67^ C 37^ C For a liquid to prevent boiling, the external atmospheric pressure must be greater than or equal to the vapour pressure of the liquid at that temperature. The vapour pressure of pure water at 37^ C is approximately 47 mm Hg . Among the given options, the closest value for the minimum atmospheric pressure required to prevent the blood

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