Measurement

Condiciones Estándar (STP)

Definición

El estado de referencia de la IUPAC para mediciones de gases: 0 °C (273,15 K) y 101,325 kPa (1 atm), en el que un mol de gas ideal ocupa 22,414 litros.

Explicación

Standard conditions allow meaningful comparison of gas volumes and reaction rates across laboratories. One mole of oxygen at STP occupies 22.414 L; at room temperature (25°C, 100 kPa) — the newer IUPAC standard conditions — it occupies 24.789 L, about 10.6% more. Always check which standard a source uses, since older chemistry texts use 0°C while newer ones use 25°C.

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