What pressure corresponds to standard conditions for a gas?

Standard conditions for a gas, commonly referred to as Standard Temperature and Pressure (STP), are defined by a specific pressure of 101.3 kPa. This value is widely recognized in scientific practice, particularly in chemistry and physics, as it corresponds to standard atmospheric pressure at sea level and is essential for accurately comparing gas behaviors.

The significance of using 101.3 kPa as the standard pressure lies in its role in gas law applications, where consistent conditions allow for reliable calculations regarding the behavior of gases, such as volume, temperature, and the number of moles present.

In this context, while a pressure of 100 kPa might seem relatively close, it does not align with this recognized standard. The values of 50 kPa and 150 kPa are also not representative of standard conditions, further clarifying that 101.3 kPa is the appropriate choice for standard pressure.