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Modified Heat of Vaporization Formula

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Modified Heat of Vaporization is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. Check FAQs

λ = (h fg + (c pv) \cdot (\frac{T w - T Sat}{2}))

λ - Modified Heat of Vaporization?h_fg - Latent Heat of Vaporization?c_pv - Specific Heat of Water Vapor?T_w - Plate Surface Temperature?T_Sat - Saturation Temperature?

Modified Heat of Vaporization Example

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Here is how the Modified Heat of Vaporization equation looks like with Values.

Here is how the Modified Heat of Vaporization equation looks like with Units.

Here is how the Modified Heat of Vaporization equation looks like.

2636 = (2260 + (23.5) \cdot (\frac{405 - 373}{2}))

2636J/kg = (2260J/kg + (23.5J/(kg*K)) \cdot (\frac{405K - 373K}{2}))

2636 = (2260 + (23.5) \cdot (\frac{405 - 373}{2}))

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Modified Heat of Vaporization Solution

Follow our step by step solution on how to calculate Modified Heat of Vaporization?

FIRST Step Consider the formula

λ = (h fg + (c pv) \cdot (\frac{T w - T Sat}{2}))

Next Step Substitute values of Variables

∴

λ = (2260J/kg + (23.5J/(kg*K)) \cdot (\frac{405K - 373K}{2}))

Next Step Prepare to Evaluate

∴

λ = (2260 + (23.5) \cdot (\frac{405 - 373}{2}))

LAST Step Evaluate

∴

λ = 2636J/kg

Modified Heat of Vaporization Formula Elements

Variables

Modified Heat of Vaporization

Modified Heat of Vaporization is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure.

Symbol: λ

Measurement: Latent HeatUnit: J/kg

Note: Value should be greater than 0.

Formulas to find Modified Heat of Vaporization

Latent Heat of Vaporization

Latent Heat of Vaporization is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure.

Symbol: h_fg

Measurement: Latent HeatUnit: J/kg

Note: Value should be greater than 0.

Formulas to find Latent Heat of Vaporization

Specific Heat of Water Vapor

Specific heat of Water Vapor is the heat required to raise the temperature of water vapor by one degree to that required to raise the temperature of an equal mass of water one degree.

Symbol: c_pv

Measurement: Specific Heat CapacityUnit: J/(kg*K)

Note: Value should be greater than 0.

Formulas to find Specific Heat of Water Vapor

Plate Surface Temperature

Plate Surface Temperature is the temperature at the surface of the plate.

Symbol: T_w

Measurement: TemperatureUnit: K

Note: Value should be greater than 0.

Formulas to find Plate Surface Temperature

Saturation Temperature

Saturation temperature is the temperature at which a given liquid and its vapour or a given solid and its vapour can co-exist in equilibrium, at a given pressure.

Symbol: T_Sat

Measurement: TemperatureUnit: K

Note: Value should be greater than 0.

Formulas to find Saturation Temperature

Other formulas in Boiling category

Go Heat Transfer Coefficient for Forced Convection Local Boiling Inside Vertical Tubes

h = (2.54 \cdot ({(ΔT x)}^{3}) \cdot \exp (\frac{p}{1.551}))

Go Excess Temperature in Boiling

T excess = T surface - T Sat

Go Critical Heat Flux by Zuber

q Max = ((0.149 \cdot L v \cdot ρ v) \cdot {(\frac{(σ \cdot [g]) \cdot (ρ L - ρ v)}{{ρ v}^{2}})}^{\frac{1}{4}})

Go Correlation for Heat Flux proposed by Mostinski

h b = 0.00341 \cdot ({P c}^{2.3}) \cdot ({T e}^{2.33}) \cdot ({P r}^{0.566})

How to Evaluate Modified Heat of Vaporization?

Modified Heat of Vaporization evaluator uses Modified Heat of Vaporization = (Latent Heat of Vaporization+(Specific Heat of Water Vapor)*((Plate Surface Temperature-Saturation Temperature)/2)) to evaluate the Modified Heat of Vaporization, The Modified Heat of Vaporization formula is defined as the function of latent heat of vapourization, specific heat of water vapor, plate surface temperature and saturated temperature. Modified Heat of Vaporization is denoted by λ symbol.

How to evaluate Modified Heat of Vaporization using this online evaluator? To use this online evaluator for Modified Heat of Vaporization, enter Latent Heat of Vaporization (h_fg), Specific Heat of Water Vapor (c_pv), Plate Surface Temperature (T_w) & Saturation Temperature (T_Sat) and hit the calculate button.

FAQs on Modified Heat of Vaporization

What is the formula to find Modified Heat of Vaporization?

The formula of Modified Heat of Vaporization is expressed as Modified Heat of Vaporization = (Latent Heat of Vaporization+(Specific Heat of Water Vapor)*((Plate Surface Temperature-Saturation Temperature)/2)). Here is an example- 2636 = (2260+(23.5)*((405-373)/2)).

How to calculate Modified Heat of Vaporization?

With Latent Heat of Vaporization (h_fg), Specific Heat of Water Vapor (c_pv), Plate Surface Temperature (T_w) & Saturation Temperature (T_Sat) we can find Modified Heat of Vaporization using the formula - Modified Heat of Vaporization = (Latent Heat of Vaporization+(Specific Heat of Water Vapor)*((Plate Surface Temperature-Saturation Temperature)/2)).

Can the Modified Heat of Vaporization be negative?

No, the Modified Heat of Vaporization, measured in Latent Heat cannot be negative.

Which unit is used to measure Modified Heat of Vaporization?

Modified Heat of Vaporization is usually measured using the Joule per Kilogram[J/kg] for Latent Heat. Kilojoule per Kilogram[J/kg], BTU per Pound[J/kg], Calorie per Gram[J/kg] are the few other units in which Modified Heat of Vaporization can be measured.

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Modified Heat of Vaporization Formula

Modified Heat of Vaporization Example

Modified Heat of Vaporization Solution

Modified Heat of Vaporization Formula Elements

Other formulas in Boiling category

How to Evaluate Modified Heat of Vaporization?

FAQs on Modified Heat of Vaporization

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