When considering gas kinetics, the formula for kinetic energy is very useful: KE

Question

When considering gas kinetics, the formula for kinetic energy is very useful: KE = (.5)mV^2. Compare the following gases and determine which one has a larger kinetic energy if they both have the same velocity. Oxygen is an essential component for human life. It is used in the metabolic process through which ATP is made. The movement of oxygen throughout the body is achieved by diffusion down pressure gradients established in the various physiological compartments, a. What is the partial pressure of oxygen in the air? If a person inhales one liter of oxygen (P = partial pressure in the air) into their lungs (volume of 5 liters) what is the final partial pressure of oxygen in the lungs? The room at room temperature (25C) and the person has a temperature of 37 degree C. Assume that oxygen exchange or mixing occurs in the lungs (i.e. n is constant).

Explanation / Answer

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Q1)

a) Oxygen or Helium

Mass of Oxygen = 16 gm/mol

Mass of Helium = 4 gm/mol

Since the velocity of both of them are same, hence kinetic energy will be higher for heavier compound

Hence the KE of oxygen will be greater than the kinetic energy of Helium

b) Argon or Neon

Mass of Argon = 40 gm/mol

Mass of Neon = 21 gm/mol

Since the velocity of both of them are same, hence kinetic energy will be higher for heavier compound

Hence the KE of argon will be greater than the kinetic energy of neon

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