In thermodynamics, the ultimate "zero" is , which occurs at (
According to the IUPAC , STP conditions use Standard zer Temperature In Celsius
Some organizations, such as the NIST , may use a "normal" temperature of ) for certain applications. 2. Absolute Zero: In thermodynamics, the ultimate "zero" is , which
In the Celsius scale, there are two distinct temperatures commonly referred to as a "standard" or "zero" point depending on the scientific context: (the freezing point of water) and (absolute zero). 1. Standard Temperature: the ultimate "zero" is
This was originally chosen based on the freezing point of pure water at sea level.
as the reference point for measuring gas properties like volume and molar mass.
For most chemical and physical calculations, "Standard Temperature" is defined as (