[{"data":1,"prerenderedAt":166},["ShallowReactive",2],{"reference-water-vapor-pressure":3},{"table":4},{"id":5,"slug":6,"title":7,"shortTitle":8,"category":9,"description":10,"metaDescription":11,"columns":12,"rows":27,"entryCount":138,"source":139,"notes":142,"relatedTopics":147,"relatedElements":153,"seoKeywords":154,"relatedReferences":161,"tableTitle":163,"tableDescription":164,"seoTitle":165},16,"water-vapor-pressure","Vapor Pressure of Water at Different Temperatures","Water Vapor Pressure","gases-liquids","Vapor pressure of liquid water from 0 °C to 100 °C in torr, kPa, and atm. Needed whenever a gas is collected over water: subtract the water vapor pressure from the total pressure (Dalton's law, P(gas) = P(total) − P(H₂O)) before applying the ideal gas law.","Vapor pressure of water from 0 to 100 °C in torr, kPa, and atm, for gas collection over water and partial-pressure corrections.",[13,18,21,24],{"key":14,"label":15,"type":16,"sortType":17},"t","Temperature (°C)","text","numeric",{"key":19,"label":20,"type":16,"sortType":17},"torr","Vapor Pressure (torr)",{"key":22,"label":23,"type":16,"sortType":17},"kpa","Vapor Pressure (kPa)",{"key":25,"label":26,"type":16,"sortType":17},"atm","Vapor Pressure (atm)",[28,33,38,43,48,53,58,63,68,73,78,83,88,93,98,103,108,113,118,123,128,133],{"t":29,"torr":30,"kpa":31,"atm":32},"0","4.6","0.611","0.00603",{"t":34,"torr":35,"kpa":36,"atm":37},"4","6.1","0.814","0.00803",{"t":39,"torr":40,"kpa":41,"atm":42},"10","9.2","1.228","0.0121",{"t":44,"torr":45,"kpa":46,"atm":47},"15","12.8","1.706","0.0168",{"t":49,"torr":50,"kpa":51,"atm":52},"20","17.5","2.339","0.0231",{"t":54,"torr":55,"kpa":56,"atm":57},"22","19.8","2.645","0.0261",{"t":59,"torr":60,"kpa":61,"atm":62},"25","23.8","3.170","0.0313",{"t":64,"torr":65,"kpa":66,"atm":67},"30","31.9","4.247","0.0419",{"t":69,"torr":70,"kpa":71,"atm":72},"35","42.2","5.629","0.0556",{"t":74,"torr":75,"kpa":76,"atm":77},"40","55.4","7.384","0.0729",{"t":79,"torr":80,"kpa":81,"atm":82},"45","72.0","9.594","0.0947",{"t":84,"torr":85,"kpa":86,"atm":87},"50","92.6","12.4","0.122",{"t":89,"torr":90,"kpa":91,"atm":92},"55","118.2","15.8","0.156",{"t":94,"torr":95,"kpa":96,"atm":97},"60","149.6","19.9","0.197",{"t":99,"torr":100,"kpa":101,"atm":102},"65","187.8","25.0","0.247",{"t":104,"torr":105,"kpa":106,"atm":107},"70","234.0","31.2","0.308",{"t":109,"torr":110,"kpa":111,"atm":112},"75","289.5","38.6","0.381",{"t":114,"torr":115,"kpa":116,"atm":117},"80","355.6","47.4","0.468",{"t":119,"torr":120,"kpa":121,"atm":122},"85","434.0","57.9","0.571",{"t":124,"torr":125,"kpa":126,"atm":127},"90","526.4","70.2","0.693",{"t":129,"torr":130,"kpa":131,"atm":132},"95","634.6","84.6","0.835",{"t":134,"torr":135,"kpa":136,"atm":137},"100","760.0","101.3","1",22,{"label":140,"url":141},"Computed from the IAPWS-IF97 saturation-pressure equation (IAPWS Industrial Formulation 1997, Region 4)","http://www.iapws.org/relguide/IF97-Rev.html",[143,144,145,146],"Water boils when its vapor pressure equals the external pressure (exactly 760 torr, 1 atm, at 100 °C), which is why the table ends there.","Collecting a gas over water: the trapped gas is saturated with water vapor, so P(dry gas) = P(total) − P(H₂O) at the collection temperature T. Look up P(H₂O) at that temperature here.","Vapor pressure grows roughly exponentially with temperature (Clausius-Clapeyron); interpolate between rows for intermediate temperatures.","Values are computed from the IAPWS-IF97 saturation-pressure equation; the 100 °C entry is the defined normal boiling point (1 atm = 760 torr), which the equation itself places at 99.97 °C.",[148,149,150,151,152],"gases-and-gas-laws","intermolecular-forces-and-phase-changes","chemical-equilibrium","entropy-and-free-energy","electrochemistry",[],[155,156,157,158,159,160],"vapor pressure of water table","water vapor pressure torr","collecting gas over water","Dalton law partial pressure","vapor pressure kPa","water boiling point pressure",[162],"phase-diagrams","Vapor Pressure of Water, 0 to 100 °C","Water boils when its vapor pressure equals the external pressure; interpolate between rows as needed.","Vapor Pressure of Water by Temperature",1787246032726]