• Introduction

• Conversions

• Weight/liquid volume

• Diffusion coefficient

• Antoine's coeff.

• Vapour pressure
• Predefined products
• Personal coeff.

Tool Box
  

Calcul of vapour pressure
(with specified Antoine's coefficients)

Input :
Temperature
Temperature Unit	Kelvin Celsius Fahrenheit Rankine
Antoine A
Antoine B
Antoine C
Formula scale	log (base 10) ln (base e)
Pressure Unit	mmHg Bar mBar Pa kPa psia
Result :
Vapour pressure (mmHg)
Vapour pressure (kPa)
Vapour pressure (bar)
Vapour pressure (psia)

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How to use this calculation tool

This tool calculates the product vapour pressure at a specified temperature using given Antoine's coefficients and formula. The formula log₁₀(P)=A-B/(C+T) applies when "log base 10" is selected and ln(P)=A-B/(C+T) when "natural log" is selected.

For example, if you know that Antoine's coefficients for ethanol are A_Ethanol=18.9119, B_Ethanol=3803.98 and C_Ethanol=-41.68 for ln (base e) formula with temperature in K and pressure in mmHg.
Then P_{Ethanol_293K} is P=e^{18.9119-3803.98/(-41.68+293)}= 43.6367 mmHg.