Measurement

Standart Koşullar (STP)

Tanım

Gaz ölçümleri için IUPAC referans durumu: 0 °C (273,15 K) ve 101,325 kPa (1 atm); bu koşullarda 1 mol ideal gaz 22,414 litre kaplar.

Açıklama

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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