Question

1.Why are these pressures called partial pressures? (multiple choice)

a. Each of these pressures is less than 760 mmHg, e.g. it makes only a part of the atmospheric pressure and therefore it is called partial.

b. Air is a gas mixture, the pressure that each gas exerts as part of the total pressure is called the partial pressure of that gas.

c. The pressure exerted by a gas or a gas mixture on a particular part of body is called the partial pressure.

d. Each component (part) of the air in the lungs has its own volume, pressure and temperature. These quantities are called partial.

2. Why does a sealed bag of chips expand when you take it to a higher altitude? (Multiple Choice)

a.Because the atmospheric pressure decreases as altitude increases.

b.Because the gravitation force increases as altitude increases.

c.Because the average kinetic energy of air molecules increases as altitude increases.

d.Because the density of the air increases as altitude increases.

Answer 1

1.Why are these pressures called partial pressures? (multiple choice).

b. Air is a gas mixture, the pressure that each gas exerts as part of the total pressure is called the partial pressure of that gas.

According to Dalton's law of partial pressure total pressure = sum of the individual gases in the air contribute to the total atmospheric pressure as a function of the percentage each gas contributes to the total volume.

2. Why does a sealed bag of chips expand when you take it to a higher altitude? (Multiple Choice)

a.Because the atmospheric pressure decreases as altitude increases.

According to Boyle's law pressure x volume = constant (PV = constant), as we move from lower altitude to higher altitude the pressure becomes gradually decreases, if pressure decreases volume increases.

Few real examples:

1. An air filled balloon becomes contracts when you move from surface of the sea water into inside depth.

2. Hydrogen and helium filled ballons when lifted into the atmosphere after some time they reach higher altitude due to their lighter mass than atmospheric gases and becomes expanded. Finally they will blown out due to increased volume, hence scientists who are working on weather forecasting never fills the balloon completely upto their eleasticity.

3. You cannot cook dal and prtoein related foods on top of the hill without using pressure cooker.

Thank You So Much! Please Rate this answer as you wish.("Thumbs Up")