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Home » Pressure 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
Pressure 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
CBSE | Chemistry | Class 11 | NCERT | Some Basic Concepts of Chemistry
Pressure 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

As per definition, pressure is force per unit area of the surface.

P = \frac{F}{A}

= \frac{1034\;g\;\times \;9.8\;ms^{-2}}{cm^{2}}\times \frac{1\;kg}{1000\;g}\times \frac{(100)^{2}\;cm^{2}}{1 m^{2}}

= 1.01332 × 10^{5}105 kg m^{-1} s^{-2}

Now,

1 N = 1 kg ms^{-2}

Then,

1 Pa = 1 Nm^{-2}

=1 kgm^{-1}{s}^{-2}

Pa   = 1 kgm^{-1} s^{-2}

Pressure (P) = 1.01332 \times 10^{5} Pa

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