NEET-XI-Chemistry
01: Some Basic Concepts of Chemistry
- #13Pressure is determined as force per unit area of the surface. The SI unit of pressure, Pascal is as shown below:
1Pa = 1N m-2
If mass of air at sea level is 1034 g cm-2, calculate the pressure in Pascal.
Ans : Pressure is defined as force acting per unit area of the surface.

= 1.01332 × 105 kg m-1s-2
We know,
1 N = 1 kg ms-2
Then,
1 Pa = 1 Nm-2 = 1 kg m-2s-2
1 Pa = 1 kg m-1s-2
∴ Pressure = 1.01332 × 105 Pa