# Standard state of a substance - definition

In chemistry, the standard state of a material (pure substance, mixture or solution) is a reference point used to calculate its properties under different conditions. IUPAC recommends using a standard pressure $p^\circ=10^5\ \mathrm{Pa}$. Strictly speaking, temperature is not part of the definition of a standard state. For example, the standard state of a gas is conventionally chosen to be unit pressure (usually in bar) ideal gas, regardless of the temperature.

Source: Wikipedia

Now, as we can see the definition for the standard state of gas is independent of its temperature as well as volume. But the properties of gas depend on those and standard state is a reference point for calculating properties. So shouldn’t the definition of standard state for an ideal gas include temperature or volume?

• – ralk912 Mar 15 '18 at 17:20
• – Loong Mar 15 '18 at 17:41