Specific Humidity Calculator

✖Relative humidity is the amount of water vapor present in the air, expressed as a percentage of the maximum amount of water vapor the air can hold at a given temperature.ⓘ Relative Humidity [Φ]			+10% -10%
✖Vapor pressure of pure component A is the pressure exerted by its vapor when the liquid (or solid) phase is in equilibrium with its vapor phase at a given temperature in a closed system.ⓘ Vapor Pressure of Pure Component A [PA^o]			+10% -10%
✖Partial pressure refers to the pressure exerted by a single gas within a mixture of gases, the pressure that the gas would exert if it occupied the entire volume of the mixture.ⓘ Partial Pressure [p_partial]			+10% -10%

✖Specific humidity is the ratio of the mass of water vapor to the total mass of moist air, usually expressed in grams of water vapor per kilogram of air (g/kg).ⓘ Specific Humidity [SH]

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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)
SH = 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 moist air, usually expressed in grams of water vapor per kilogram of air (g/kg).
Relative Humidity - Relative humidity is the amount of water vapor present in the air, expressed as a percentage of the maximum amount of water vapor the air can hold at a given temperature.
Vapor Pressure of Pure Component A - (Measured in Pascal) - Vapor pressure of pure component A is the pressure exerted by its vapor when the liquid (or solid) phase is in equilibrium with its vapor phase at a given temperature in a closed system.
Partial Pressure - (Measured in Pascal) - Partial pressure refers to the pressure exerted by a single gas within a mixture of gases, the pressure that the gas would exert if it occupied the entire volume of the mixture.

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

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

Evaluating ... ...

SH = 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 00.020 seconds)

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Created by Suman Ray Pramanik

Indian Institute of Technology (IIT), Kanpur

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< Refrigeration Parameters Calculators

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

Relative Density

LaTeX Go Relative Density = Density/Water Density

Specific Humidity Formula

LaTeX Go

Specific Humidity = 0.622*Relative Humidity*Vapor Pressure of Pure Component A/(Partial Pressure-Relative Humidity*Vapor Pressure of Pure Component A)
SH = 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 formula is defined as a measure of the mass of water vapor present in a given mass of air. It is essential for understanding moisture content in various thermodynamic processes, particularly in refrigeration and climate control applications. Specific Humidity is denoted by SH 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 -> 0.620592 = 0.622*0.616523*2700/(3333-0.616523*2700).

FAQ

What is Specific Humidity?

Specific Humidity formula is defined as a measure of the mass of water vapor present in a given mass of air. It is essential for understanding moisture content in various thermodynamic processes, particularly in refrigeration and climate control applications and is represented as SH = 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 amount of water vapor present in the air, expressed as a percentage of the maximum amount of water vapor the air can hold at a given temperature, Vapor pressure of pure component A is the pressure exerted by its vapor when the liquid (or solid) phase is in equilibrium with its vapor phase at a given temperature in a closed system & Partial pressure refers to the pressure exerted by a single gas within a mixture of gases, the pressure that the gas would exert if it occupied the entire volume of the mixture.

How to calculate Specific Humidity?

Specific Humidity formula is defined as a measure of the mass of water vapor present in a given mass of air. It is essential for understanding moisture content in various thermodynamic processes, particularly in refrigeration and climate control applications 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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