
Interpretation:
After defining the pressure of the atmosphere, the cause for this pressure have to be explained.
Concept Introduction:
Pressure is defined as force per unit area. Gas molecules exerted pressure because of their collision with the wall of the container.

Answer to Problem 2A
Earth is surrounded by the extended atmosphere. The pressure exerted by the atmosphere is called the pressure of the atmosphere. Earth’s atmosphere composed of many gas particles randomly moving in every direction. Therefore, pressure exerted by the atmosphere because of the gas particles in the air which are being pulled towards the center of earth due to gravity.
Explanation of Solution
Earth is surrounded by the extended atmosphere. The pressure exerted by the atmosphere is called the pressure of the atmosphere. Earth’s atmosphere composed of many gas particles randomly moving in every direction. Gas particles in the air that causes this exert this atmospheric pressure. This atmospheric pressure is high in the earth’s surface as the population of the gas particles are greater due to the gravity which pulls the molecules towards the center of earth. Therefore, pressure exerted by the atmosphere because of the gas particles in the air which are being pulled towards the center of earth due to gravity.
Chapter 13 Solutions
World of Chemistry, 3rd edition
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