Determination of standard conditions
Thread Content
I’ve been troubled by a question recently: why are many domestic standard conditions set at 20 degrees Celsius and 1.01325 bar? Aren’t it 273K and 1.01325 bar?
The standard state of a gas refers to 25 degrees Celsius (in chemistry) and 20 degrees Celsius (in physics), at 101.325 kilopascals. The standard conditions for gases refer to 0 degrees Celsius (in chemistry and physics) and 101.325 kilopascals. Note: “Condition” and “status” have different meanings. Now LZ should be able to understand, right?
Many domestic national standards, such as the \"Comprehensive Emission Standards for Air Pollutants,\" define the standard state as a condition with a temperature of 273 K and a pressure of 101325 Pa.
The standard condition for industrial production in China is set at 20 degrees Celsius and 1.01325 bar. 273 K and 1.01325 bar are the standard conditions for theoretical research in chemical and physical sciences.