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