Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Standard temperature and pressure (STP) refers to specific conditions used for comparing gases under standardized settings. STP conditions include a temperature of 0 degrees Celsius (273 Kelvin) and atmospheric pressure at sea level (~1 atmosphere).
Related terms
Kelvin: The SI unit of temperature, where 0 Kelvin represents absolute zero.
Atmosphere (atm): A unit of pressure equal to the average atmospheric pressure at sea level.