learn.howToCalculate
learn.whatIsHeading
Gas collection by water displacement; measured gas volume must be corrected for water vapor pressure at temperature.
Trin-for-trin guide
- 1Input measured volume, temperature, atmospheric pressure
- 2Correct for water vapor pressure
- 3Calculate dry gas volume at STP or other condition
Løste eksempler
Input
O₂ collected at 25°C, 760 mmHg, wet
Resultat
Correct for 23.8 mmHg H₂O vapor pressure; V_dry = 0.969 × V_wet
Almindelige fejl at undgå
- ✕Forgetting water vapor pressure correction
- ✕Not converting to STP correctly
Ofte stillede spørgsmål
Why correct for water vapor?
Measured gas is mixture of gas + H₂O vapor; must subtract partial pressure for true gas amount.
Klar til at beregne? Prøv den gratis Gas Collection-beregner
Prøv det selv →