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Standard temperature and pressure (STP) or standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data.
Under these conditions, which became known as standard temperature and pressure (STP), scientists discovered that 1 mole of a gas, regardless of its identity, occupied a volume of 22.4 liters.
Standard temperature and pressure, or STP, are the reference conditions used in chemistry to compare gas properties. The reason for having standard conditions is that they conveniently allow consistent measurements of gas properties like mass and volume.
STP - Standard Temperature and Pressure - is defined by IUPAC (International Union of Pure and Applied Chemistry) as air at 0 oC (273.15 K, 32 oF) and 105 pascals (1 bar).
The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atm pressure. This is the freezing point of pure water at sea level atmospheric pressure. At STP, one mole of gas occupies 22.4 L of volume (molar volume).
Standard temperature and pressure (STP) refers to the nominal conditions in the atmosphere at sea level. These conditions are 0 degrees Celsius and 1 atmosphere (atm) of pressure. The STP value is important to physicists, chemists, engineers, pilots and navigators, among others.
The International Union of Pure and Applied Chemistry (IUPAC) defines standard temperature as 273.15 K (0° Celsius, 32° Fahrenheit), and standard pressure as 100,000 Pa (1 bar). However, the traditional definition considers a pressure of 1 atm (atmospheric pressure at sea level).
Standard temperature and pressure commonly is abbreviated as STP. The standard state temperature is 25°C (298 K). It is possible to calculate standard state values for other temperatures. All liquids are pure. The concentration of all solutions is 1 M (1 molar). All gases are pure. All gases are at 1 atm pressure.
The standard temperature is defined as 0 degrees Celsius (273.15 Kelvin), which is the freezing point of water. The standard pressure is defined as 1 atmosphere (atm), which is equivalent to 101.325 kilopascals (kPa) or 760 millimeters of mercury (mmHg).
Standard conditions for temperature and pressure, or STP, also referred to as standard conditions for gases, is a specific pressure and temperature that scientists use to report the properties of gases.