STP - Standard Temperature and Pressure - is defined by IUPAC (International Union of Pure and Applied Chemistry) as air at 0 oC (273.15 K, 32 oF) and 105 pascals (1 bar). STP - commonly used in the Imperial and USA system of units - as air at 60 oF (520 o R, 15.6 oC ) ...
In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals. ideal gas lawAccording to the ideal gas law, when a gas is compressed into a smaller volume, the number and velocity of molecular collisions ...