Standard Temperature and Pressure

It is necessary to define standard reference conditions in order to perform gas calculations. In the field of chemistry, standard temperature and pressure (STP) is a specific set of conditions that is used when comparing properties of gases. Before we discuss the commonly accepted STP, let's discuss the meaning of 'properties'.

Properties

A property is a set of identifying characteristics for a substance. Important properties for any substance in the field of chemistry are physical properties and chemical properties.