Water - Heat of Vaporization vs. Temperature

The (latent) heat of vaporization (∆Hvap) also known as the enthalpy of vaporization or evaporation, is the amount of energy (enthalpy) that must be added ... EngineeringToolBox-Resources,ToolsandBasicInformationforEngineeringandDesignofTechnicalApplications! Water-HeatofVaporizationvs.TemperatureOnlinecalculator,figuresandtablesshowingheatofvaporizationofwater,attemperaturesfrom0-370°C(32-700°F)-SIandImperialunits.SponsoredLinksThe(latent)heatofvaporization(∆Hvap)alsoknownastheenthalpyofvaporizationorevaporation,istheamountofenergy(enthalpy)thatmustbeaddedtoaliquidsubstance,totransformagivenquantityofthesubstanceintoagas.Theenthalpyofvaporizationisafunctionofthepressureatwhichthattransformationtakesplace.Theheatofvaporizationdiminisheswithincreasingtemperatureanditvanishescompletelyatacertainpointcalledthecriticaltemperature(Criticaltemperatureforwater:373.946°C or705.103°F, Criticalpressure:220.6bar=22.06MPa =3200psi).OnlineWaterHeatofVaporizationCalculatorThecalculatorbelowcanbeusedtocalculatetheliquidwaterheatofvaporizationatvaporpressureatgiventemperatures.TheoutputheatisgivenaskJ/mol,kJ/kg,kWh/kg,cal/g, Btu(IT)/molandBtu(IT)/lbm.Note!Temperaturemustbewithintheranges0-370°C,32-700°F,273-645Kand492-1160°Rtogetvalidvalues.TemperatureChoosetheactualunitoftemperature:°C°FK°RForvaporpressure-checktablesbelow.SeeWaterand HeavyWater-forthermodynamicproperties.SeealsoWater Boilingpointsathighpressure,Boilingpointsatvacuumpressure,Density,specificweightandthermalexpansioncoefficient,Dynamicandkinematicviscosity,Enthalpyandentropy,IonizationConstant,pKw,ofnormalandheavywater,Meltingpointsathighpressure,Saturationpressure,Specificgravity,Specificheat(heatcapacity)andSpecificvolumeforonlinecalculatores,andsimilarfiguresandtablesasshownbelow.Heatofvaporizationforliquidwateratsaturationpressureattemperaturesfrom0to374°C:TemperatureVaporpressureHeatofvaporization,∆Hvap[°C][kPa][100*bar][J/mol][kJ/kg][Wh/kg][Btu(IT)/lbm]0.010.61165450542500.9694.691075.220.70599449702496.2693.391073.240.81355448832491.4692.061071.1101.2282446272477.2688.111065.0141.5990444562467.7685.471060.9182.0647442872458.3682.861056.9202.3393442002453.5681.531054.8253.1699439882441.7678.251049.7304.2470437742429.8674.941044.6345.3251436022420.3672.311040.5407.3849433452406.0668.331034.4449.1124431722396.4665.671030.35012.352429112381.9661.641024.05415.022427382372.3658.971019.96019.946424752357.7654.921013.67031.201420302333.0648.061003.08047.414415792308.0641.11992.269070.182411202282.5634.03981.309687.771408392266.9629.69974.59100101.42406502256.4626.78970.08110143.38401672229.6619.33958.56120198.67396712202.1611.69946.73140361.54386302144.3595.64921.88160618.23375082082.0578.33895.101801002.8362862014.2559.50865.952001554.9349441939.7538.81833.922202319.6334621857.4515.94798.542403346.9318041765.4490.39758.992604692.3299341661.6461.56714.362806416.6277981543.0428.61663.373008587.9253041404.6390.17603.8732011284223101238.4344.00532.4234014601185071027.3285.36441.663601866612967719.8199.9309.5373.9462206400.00.00.0Heatofvaporizationforliquidwateratsaturationpressureattemperaturesfrom0to705°F:TemperatureVaporpressureHeatofvaporization, ∆Hvap[°F][psi][Btu(IT)/mol][Btu(IT)/lbm][cal/g][kJ/kg]32.20.089142.701075.2597.332500.9400.121942.521070.7594.822490.4500.178342.301065.0591.672477.2600.256442.071059.4588.542464.1700.363241.851053.7585.392450.9800.507341.621048.0582.252437.7900.699041.401042.4579.092424.51000.950641.171036.7575.922411.31101.27740.951030.9572.742398.01201.69540.721025.2569.552384.61302.22640.491019.4566.342371.21402.89340.261013.6563.132357.71503.72340.021007.7559.862344.01604.74739.791001.8556.582330.31706.00039.55995.87553.262316.41807.51939.31989.85549.922302.41909.35039.07983.76546.542288.220011.5438.83977.60543.112273.921014.1438.58971.35539.642259.421214.7138.53970.08538.932256.422017.2038.33965.02536.122244.624024.9937.81952.05528.922214.526035.4537.28938.64521.462183.328049.2236.73924.71513.732150.930066.636.15910.21505.672117.135013534.59870.97483.872025.940024732.82826.41459.121922.245042230.78774.93430.511802.550068028.37714.36396.871661.6550104425.48641.56356.421492.3600154121.93552.09306.721284.2625184919.41488.64271.461136.6650220516.95426.81237.11992.8675261513.47339.22188.46789.0705.10331960.000.000.000.0SponsoredLinksRelatedTopicsWaterSystems-Hotandcoldwaterservicesystems-designproperties,capacities,sizingandmore.MaterialProperties-Materialpropertiesofgases,fluidsandsolids-densities,specificheats,viscositiesandmore.SteamandCondensate-Steam&condensatesystems-properties,capacities,pipesizing,systemsconfigurationandmore.Thermodynamics-Work,heatandenergysystems.Thermodynamics-Thermodynamicsofsteamandcondensatesystems.BoilingPoints-Boilingpointsofelements,productsandchemicalspeciesatvaryingconditions.RelatedDocumentsCompressedWater-Propertiesvs.Temperature-Specificvolume,enthalpyandentropyofcompressedwater.GasesSolvedinWater-DiffusionCoefficients-Diffusionflux[kg/m2s]tellshowfastasubstansesolvedinanothersubstanceflowsduetoconcentrationgradients.Diffusionconstants[m2/s]forseveralgasesinwater.IceandWater-MeltingPointsvs.Pressure-Onlinecalculator,figuresandtableswithmeltingpointsoficetowateratpressuresrangingfrom0to29000psia(0to2000bara).Temperaturegivenas°C,°F,Kand°R.Seawater-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