NCERT Class XI Chemistry Some Basic Concepts of Chemistry Solutions

Question : 13

Total: 36

Pressure is determined as force per unit area of the surface. The SI unit of pressure, pascal is 1 Pa = 1 Nm–2. If mass of air at sea level is 1034gcm–2, calculate the pressure in pascal.

Solution:

Mass of air at sea level = 1034 gcm–2
Acceleration due to gravity, g = 9.8 ms–2
Pressure of air =

1034

1000

× 9.8 × 100 × 100 = 1.01332 × 105 Pa

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