Specific Humidity Calculator

✖Relative Humidity is the ratio of the partial pressure of water vapor in the mixture to the vapor pressure of water at a given temperature.ⓘ Relative Humidity [Φ]			+10% -10%
✖Vapor Pressure of Pure Component A is the pressure exerted by a liquid or solid molecules of only A in a closed system in which they are in equilibrium with the vapour phase.ⓘ Vapor Pressure of Pure Component A [PA^o]			+10% -10%
✖Partial Pressure is the notional pressure of that constituent gas if it alone occupied the entire volume of the original mixture at the same temperature.ⓘ Partial Pressure [p_partial]			+10% -10%

✖Specific Humidity is the ratio of the mass of water vapor to the total mass of the air parcel.ⓘ Specific Humidity [ω]

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Formula

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Specific Humidity

Formula

`"ω" = 0.622*"Φ"*"PA"^{"o"}/("p"_{"partial"}-"Φ"*"PA"^{"o"})`

Example

`"0.620592"=0.622*"0.616523"*"2700Pa"/("3333Pa"-"0.616523"*"2700Pa")`

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Specific Humidity Solution

STEP 0: Pre-Calculation Summary

Formula Used

Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A)
ω = 0.622*Φ*PA^o/(p_partial-Φ*PA^o)
This formula uses 4 Variables

Variables Used

Specific Humidity - Specific Humidity is the ratio of the mass of water vapor to the total mass of the air parcel.
Relative Humidity - Relative Humidity is the ratio of the partial pressure of water vapor in the mixture to the vapor pressure of water at a given temperature.
Vapor Pressure of Pure Component A - (Measured in Pascal) - Vapor Pressure of Pure Component A is the pressure exerted by a liquid or solid molecules of only A in a closed system in which they are in equilibrium with the vapour phase.
Partial Pressure - (Measured in Pascal) - Partial Pressure is the notional pressure of that constituent gas if it alone occupied the entire volume of the original mixture at the same temperature.

STEP 1: Convert Input(s) to Base Unit

Relative Humidity: 0.616523 --> No Conversion Required
Vapor Pressure of Pure Component A: 2700 Pascal --> 2700 Pascal No Conversion Required
Partial Pressure: 3333 Pascal --> 3333 Pascal No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

ω = 0.622*Φ*PA^o/(p_partial-Φ*PA^o) --> 0.622*0.616523*2700/(3333-0.616523*2700)

Evaluating ... ...

ω = 0.620592325202071

STEP 3: Convert Result to Output's Unit

0.620592325202071 --> No Conversion Required

FINAL ANSWER

0.620592325202071 ≈ 0.620592 <-- Specific Humidity

(Calculation completed in 00.004 seconds)

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Created by Suman Ray Pramanik

Indian Institute of Technology (IIT), Kanpur

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< 11 Refrigeration Parameters Calculators

Density of Two Liquids

Go Density of Two Liquids = (Mass of Liquid A+Mass of Liquid B)/(Mass of Liquid A/Density of Liquid A+Mass of Liquid B/Density of Liquid B)

Specific Humidity

Go Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A)

Spring Work

Go Spring work = Spring Constant*(Displacement at point 2^2-Displacement at point 1^2)/2

Shaft Power

Go Shaft Power = 2*pi*Revolutions per Second*Torque Exerted on Wheel

Refrigerator Work

Go Refrigerator Work = Heat from High Temperature Reservoir-Heat from Low Temperature Reservoir

Vapour Quality

Go Vapour Quality = Vapour Mass/(Vapour Mass+Fluid mass)

Real Refrigerator

Go Real Refrigerator = Heat from Low Temperature Reservoir/Work

Dew Point Depression

Go Dewpoint Depression = Temperature-Dewpoint Temperature

Degree of Saturation

Go Degree of Saturation = Volume of Water/Volume of Voids

Water Equivalent

Go Water equivalent = Mass of Water*Specific Heat

Relative Density

Go Relative Density = Density/Water Density

Specific Humidity Formula

Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A)
ω = 0.622*Φ*PA^o/(p_partial-Φ*PA^o)

What is Specific Humidity?

Specific humidity is the ratio of the mass of water vapor to the total mass of the air parcel. Specific humidity is approximately equal to the mixing ratio, which is defined as the ratio of the mass of water vapor in an air parcel to the mass of dry air for the same parcel.

How to Calculate Specific Humidity?

Specific Humidity calculator uses Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A) to calculate the Specific Humidity, Specific humidity is the ratio of the mass of water vapor to the total mass of the air parcel. Sometimes referred to as the humidity ratio. Specific Humidity is denoted by ω symbol.

How to calculate Specific Humidity using this online calculator? To use this online calculator for Specific Humidity, enter Relative Humidity (Φ), Vapor Pressure of Pure Component A (PA^o) & Partial Pressure (p_partial) and hit the calculate button. Here is how the Specific Humidity calculation can be explained with given input values -> -0.624815 = 0.622*0.616523*2700/(3333-0.616523*2700).

FAQ

What is Specific Humidity?

Specific humidity is the ratio of the mass of water vapor to the total mass of the air parcel. Sometimes referred to as the humidity ratio and is represented as ω = 0.622*Φ*PA^o/(p_partial-Φ*PA^o) or Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A). Relative Humidity is the ratio of the partial pressure of water vapor in the mixture to the vapor pressure of water at a given temperature, Vapor Pressure of Pure Component A is the pressure exerted by a liquid or solid molecules of only A in a closed system in which they are in equilibrium with the vapour phase & Partial Pressure is the notional pressure of that constituent gas if it alone occupied the entire volume of the original mixture at the same temperature.

How to calculate Specific Humidity?

Specific humidity is the ratio of the mass of water vapor to the total mass of the air parcel. Sometimes referred to as the humidity ratio is calculated using Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A). To calculate Specific Humidity, you need Relative Humidity (Φ), Vapor Pressure of Pure Component A (PA^o) & Partial Pressure (p_partial). With our tool, you need to enter the respective value for Relative Humidity, Vapor Pressure of Pure Component A & Partial Pressure and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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