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Q. Pressure of 1 atm ______ Pa
Answer: In the physical sciences, pressure is the perpendicular force per unit area. It can be also defined as the stress at a point within a confined fluid. Each unit area of Earth’s surface constitutes atmospheric pressure as the weight of the atmosphere pushing down on its surface. About 15 pounds/ sq. inch is the force exerted at the sea level. The SI units, the pressure is calculated in Pascals where one pascal equals one newton per square metre. Atmospheric pressure is near to 100,000 pascals.
Pressure
The pressure is expressed like it’s directly proportional to force and inversely proportional to area. Pressure has only magnitude but no direction so it is a scalar quantity. The pressure can have either positive or negative value.
Solution-
Pressure of 1 Atm is given by
1.013 x 10 5 Pa.
The units that express the pressure are Bar and atm.
One newton force acting on the 1m2 area is expressed as a Pascal.
Relation between Bar and Atm
The relationship between Bar to ATM can be represented as
1 bar = 0.986923 atm
or
1 atm = 1.01325 bar
At sea level, 1 atm pressure exerted by the column atmosphere
1 atm=101.325 kPa
