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What is "STP"?

The abbreviation STP is often used for standard temperature and pressure. As a matter of convenience, scientists have chosen a specific temperature and pressure as standards for comparing gas volumes. The standard temperature is 0° Celsius (32⁰ Fahrenheit or 273⁰ Kelvin) and the standard pressure is 760 torr (29.92 inches or 1 atmosphere).

Source: Kroschwitz. Jacqueline I. Chemistry, p. 212.

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