Question

1 atm= Z pascal. Then find the value of Z?
A. 760
B. 1000
C. 101325
D. 10

Answer 1

Hint: The standard atmosphere (atm) is a unit of pressure. It is sometimes used as a reference or standard pressure. It is approximately equal to the atmospheric pressure at sea level. 1 atm in S.I. units is equal to 1.01325 $ \times {10^5}N{m^{ - 2}}$. Use this concept to find the value 1 atm is the standard atmospheric pressure.

Complete Step-by-Step solution:
According to the question, 1 atm (atmospheric pressure) = Z Pascal.
We know that the value of 1 atmospheric pressure in SI units is = 1.01325.
We also know that 1 Pascal is =${10^5}dyne/c{m^2}$ .
To convert the value of 1 atmospheric pressure in the Z value of Pascal we have to multiply these two values that are mentioned above.
Therefore, In Si units 1 atmospheric pressure =1.01325 and 1 Pascal is = ${10^5}dyne/c{m^2}$
So, 1 atm (atmospheric pressure) = $1.01325 \times {10^5}N{m^{ - 2}}$ which is equal to 101325.
Hence, option C is correct.

Note: Atmospheric pressure can be defined as the pressure exerted by the atmosphere weight having a mean value of 101,325 Pascal at sea level. Or the pressure within the atmosphere of the earth. Pascal is the SI unit of pressure and its formula is $\dfrac{F}{A}$ (force/area). We cannot sense the pressure of the atmosphere since the body is also full of air. The pressure inside the respiratory system, the blood vessels, and other organs are the same as the pressure on our body from the outside is exerted.