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Partial Pressure of Water Vapor Formula

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Pressure of Water Vapor is the pressure exerted by the water vapor in the moist air or the mixture of dry air and water vapor. Check FAQs

p v = p w - \frac{(p t - p w) \cdot (t db - T w)}{1544 - 1.44 \cdot T w}

p_v - Pressure of Water Vapor?p_w - Saturation Pressure Corresponding to WBT?p_t - Total Pressure of Moist Air?t_db - Dry Bulb Temperature in °C?T_w - Wet Bulb Temperature?

Partial Pressure of Water Vapor Example

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Here is how the Partial Pressure of Water Vapor equation looks like with Values.

Here is how the Partial Pressure of Water Vapor equation looks like with Units.

Here is how the Partial Pressure of Water Vapor equation looks like.

60.1201 = 200 - \frac{(100 - 200) \cdot (110 - 753)}{1544 - 1.44 \cdot 753}

60.1201Bar = 200Bar - \frac{(100Bar - 200Bar) \cdot (110 - 753)}{1544 - 1.44 \cdot 753}

60.1201 = 200 - \frac{(100 - 200) \cdot (110 - 753)}{1544 - 1.44 \cdot 753}

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Partial Pressure of Water Vapor Solution

Follow our step by step solution on how to calculate Partial Pressure of Water Vapor?

FIRST Step Consider the formula

p v = p w - \frac{(p t - p w) \cdot (t db - T w)}{1544 - 1.44 \cdot T w}

Next Step Substitute values of Variables

∴

p v = 200Bar - \frac{(100Bar - 200Bar) \cdot (110 - 753)}{1544 - 1.44 \cdot 753}

Next Step Convert Units

∴

p v = 2E+7Pa - \frac{(1E+7Pa - 2E+7Pa) \cdot (110 - 753)}{1544 - 1.44 \cdot 753}

Next Step Prepare to Evaluate

∴

p v = 2E+7 - \frac{(1E+7 - 2E+7) \cdot (110 - 753)}{1544 - 1.44 \cdot 753}

Next Step Evaluate

∴

p v = 6012008.35363732Pa

Next Step Convert to Output's Unit

∴

p v = 60.1200835363732Bar

LAST Step Rounding Answer

∴

p v = 60.1201Bar

Partial Pressure of Water Vapor Formula Elements

Variables

Pressure of Water Vapor

Pressure of Water Vapor is the pressure exerted by the water vapor in the moist air or the mixture of dry air and water vapor.

Symbol: p_v

Measurement: PressureUnit: Bar

Note: Value can be positive or negative.

Formulas to find Pressure of Water Vapor

Saturation Pressure Corresponding to WBT

Saturation Pressure Corresponding to WBT (Wet Bulb Temperature) is the pressure that can be found from the steam table corresponding to wet bulb temperature.

Symbol: p_w

Measurement: PressureUnit: Bar

Note: Value can be positive or negative.

Formulas to find Saturation Pressure Corresponding to WBT

Total Pressure of Moist Air

Total Pressure of Moist Air is the pressure exerted by the mixture of air and water vapor which is equal to the sum of the respected pressures. It is also called barometric pressure.

Symbol: p_t

Measurement: PressureUnit: Bar

Note: Value can be positive or negative.

Formulas to find Total Pressure of Moist Air

Dry Bulb Temperature in °C

Dry bulb temperature in °C is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture.

Symbol: t_db

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Dry Bulb Temperature in °C

Wet Bulb Temperature

Wet Bulb Temperature is the temperature of the wet bulb and denoted by the symbol Tw.

Symbol: T_w

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Wet Bulb Temperature

Other formulas in Pressure of Water Vapor category

Go Saturation Pressure Corresponding to Wet Bulb Temperature

p w = \frac{p v + p t \cdot (\frac{t db - T w}{1544 - 1.44 \cdot T w})}{1 + (\frac{t db - T w}{1544 - 1.44 \cdot T w})}

Go Dry Bulb Temperature using Carrier's Equation

t db = ((p w - p v) \cdot \frac{1544 - 1.44 \cdot T w}{p t - p w}) + T w

Go Wet Bulb Temperature using Carrier's Equation

T w = \frac{1544 \cdot (p w - p v) - t db \cdot (p t - p w)}{1.44 \cdot (p w - p v) - (p t - p w)}

Go Total Pressure of Moist Air using Carrier's Equation

p t = \frac{(p w - p v) \cdot (1544 - 1.44 \cdot T w)}{t db - T w} + p w

How to Evaluate Partial Pressure of Water Vapor?

Partial Pressure of Water Vapor evaluator uses Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature) to evaluate the Pressure of Water Vapor, The partial pressure of water vapor formula calculates the partial pressure of water vapor by using the carrier's equation. Pressure of Water Vapor is denoted by p_v symbol.

How to evaluate Partial Pressure of Water Vapor using this online evaluator? To use this online evaluator for Partial Pressure of Water Vapor, enter Saturation Pressure Corresponding to WBT (p_w), Total Pressure of Moist Air (p_t), Dry Bulb Temperature in °C (t_db) & Wet Bulb Temperature (T_w) and hit the calculate button.

FAQs on Partial Pressure of Water Vapor

What is the formula to find Partial Pressure of Water Vapor?

The formula of Partial Pressure of Water Vapor is expressed as Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature). Here is an example- 0.002063 = 20000000-((10000000-20000000)*(110-753))/(1544-1.44*753).

How to calculate Partial Pressure of Water Vapor?

With Saturation Pressure Corresponding to WBT (p_w), Total Pressure of Moist Air (p_t), Dry Bulb Temperature in °C (t_db) & Wet Bulb Temperature (T_w) we can find Partial Pressure of Water Vapor using the formula - Pressure of Water Vapor = Saturation Pressure Corresponding to WBT-((Total Pressure of Moist Air-Saturation Pressure Corresponding to WBT)*(Dry Bulb Temperature in °C-Wet Bulb Temperature))/(1544-1.44*Wet Bulb Temperature).

Can the Partial Pressure of Water Vapor be negative?

Yes, the Partial Pressure of Water Vapor, measured in Pressure can be negative.

Which unit is used to measure Partial Pressure of Water Vapor?

Partial Pressure of Water Vapor is usually measured using the Bar[Bar] for Pressure. Pascal[Bar], Kilopascal[Bar], Pound Per Square Inch[Bar] are the few other units in which Partial Pressure of Water Vapor can be measured.

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Partial Pressure of Water Vapor Formula

Partial Pressure of Water Vapor Example

Partial Pressure of Water Vapor Solution

Partial Pressure of Water Vapor Formula Elements

Other formulas in Pressure of Water Vapor category

How to Evaluate Partial Pressure of Water Vapor?

FAQs on Partial Pressure of Water Vapor

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