What is the standard atmospheric pressure in Pa?

A standard atmospheric pressure is1.01.325×105pa (Pa).

Standardatmosphericpressure is the pressure at sea level under standard atmospheric conditions, which was put forward by physicist Torricelli and is the unit of pressure, and is recorded as atm.

In chemistry, the standard temperature and pressure (STP) was once defined as 0 C (273.15k) and101.325kpa (1ATM), but starting from 1982, IUPAC will

1 standard atmospheric pressure = 760mmhg = 76cmhg =1.01325x105pa =10.336m water column. 1 standard atmospheric pressure = 1 01325n/m2 (usually1standard atmospheric pressure =1.010.5n/m2 in calculation). 100 kpa = 0. 1 MPa.

Application of standard atmospheric pressure in life

1, weather forecast

Forecasters should always pay attention to the change of standard atmospheric pressure, because it is one of the important indicators of weather forecast. For example, when the air pressure drops, the weather usually becomes humid and sultry; When the air pressure rises, the weather will become dry and cold.

2. Flight and space exploration

Aircraft and spacecraft need to know the standard atmospheric pressure accurately in order to calculate their speed and altitude in the air. If these parameters are not calculated accurately, aircraft and spacecraft may encounter accidents.

3. Deep diving

Deep diving requires accurate mastery of the standard atmospheric pressure. With the increase of diving depth, the standard atmospheric pressure will change. Therefore, divers need to master the variation law of standard atmospheric pressure.

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