[{"data":1,"prerenderedAt":161},["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":26,"entryCount":137,"source":138,"notes":142,"relatedTopics":147,"relatedElements":153,"seoKeywords":154},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 table 0 to 100 °C in torr, kPa, and atm — the collecting-gas-over-water reference for Dalton's-law partial-pressure corrections and boiling-point reasoning.",[13,17,20,23],{"key":14,"label":15,"type":16},"t","Temperature (°C)","text",{"key":18,"label":19,"type":16},"torr","Vapor Pressure (torr)",{"key":21,"label":22,"type":16},"kpa","Vapor Pressure (kPa)",{"key":24,"label":25,"type":16},"atm","Vapor Pressure (atm)",[27,32,37,42,47,52,57,62,67,72,77,82,87,92,97,102,107,112,117,122,127,132],{"t":28,"torr":29,"kpa":30,"atm":31},"0","4.6","0.613","0.00605",{"t":33,"torr":34,"kpa":35,"atm":36},"4","6.1","0.813","0.00803",{"t":38,"torr":39,"kpa":40,"atm":41},"10","9.2","1.227","0.0121",{"t":43,"torr":44,"kpa":45,"atm":46},"15","12.8","1.707","0.0168",{"t":48,"torr":49,"kpa":50,"atm":51},"20","17.5","2.333","0.0230",{"t":53,"torr":54,"kpa":55,"atm":56},"22","19.8","2.640","0.0261",{"t":58,"torr":59,"kpa":60,"atm":61},"25","23.8","3.173","0.0313",{"t":63,"torr":64,"kpa":65,"atm":66},"30","31.8","4.240","0.0418",{"t":68,"torr":69,"kpa":70,"atm":71},"35","42.2","5.626","0.0555",{"t":73,"torr":74,"kpa":75,"atm":76},"40","55.3","7.373","0.0728",{"t":78,"torr":79,"kpa":80,"atm":81},"45","71.9","9.586","0.0946",{"t":83,"torr":84,"kpa":85,"atm":86},"50","92.5","12.3","0.122",{"t":88,"torr":89,"kpa":90,"atm":91},"55","118.0","15.7","0.155",{"t":93,"torr":94,"kpa":95,"atm":96},"60","149.4","19.9","0.197",{"t":98,"torr":99,"kpa":100,"atm":101},"65","187.5","25.0","0.247",{"t":103,"torr":104,"kpa":105,"atm":106},"70","233.7","31.2","0.307",{"t":108,"torr":109,"kpa":110,"atm":111},"75","289.1","38.5","0.380",{"t":113,"torr":114,"kpa":115,"atm":116},"80","355.1","47.3","0.467",{"t":118,"torr":119,"kpa":120,"atm":121},"85","433.6","57.8","0.571",{"t":123,"torr":124,"kpa":125,"atm":126},"90","525.8","70.1","0.692",{"t":128,"torr":129,"kpa":130,"atm":131},"95","633.9","84.5","0.834",{"t":133,"torr":134,"kpa":135,"atm":136},"100","760.0","101.3","1",22,{"label":139,"url":140,"license":141},"OpenStax Chemistry 2e, Appendix E — Water Properties","https://openstax.org/books/chemistry-2e/pages/e-water-properties","CC BY 4.0",[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(T). Look up P_H₂O at the collection temperature here.","Vapor pressure grows roughly exponentially with temperature (Clausius-Clapeyron); interpolate between rows for intermediate temperatures.","ChemWhiz problems that need a water vapor pressure supply the value in the problem statement; this table is the general reference.",[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",1785108608480]