The Roman numerals indicate various ice phases. ‡ Ice XI triple point is theoretical and has never been obtained Phase diagram Log-lin pressure–temperature phase diagram of water. Table of various forms of ice Properties of various forms of ice Melting point of ice at various pressures ĭata obtained from CRC Handbook of Chemistry and Physics 44th ed., p. 2390. The sixth column is the density of the vapor. The fifth column is the work PΔ V done by each gram of liquid that changes to vapor. The fourth column is the heat of vaporization of each gram of liquid that changes to vapor. The third column is the heat content of each gram of the liquid phase relative to water at 0 ☌. Pressure of the equilibrium is given in the second column in k Pa. Learn how water density changes with temperature and ice is less dense than water. Where P is equilibrium vapor pressure in k Pa, and T is temperature in kelvins.įor T = 273 K to 333 K: A = 7.2326 B = 1750.286 C = 38.1.įor T = 333 K to 423 K: A = 7.0917 B = 1668.21 C = 45.1.ĭata in the table above is given for water–steam equilibria at various temperatures over the entire temperature range at which liquid water can exist. Vapor pressure formula for steam in equilibrium with liquid water: log 10 P = A − B T − C, The values below 0 ☌ refer to supercooled water.Įlectrical conductivity of highly purified water at saturation pressure Temperature, ☌ Liquid physical properties Temperature dependence of the surface tension of pure water Temperature dependence of the density of ice and water Velocity of sound in water (Boiling point of methanol is -0.8☌ / 30.5☏, and thus, methanol is present as liquid below this temperature) The output density is given as kg/m 3, lb/ft 3, lb/gal(US liq) and sl/ft 3. Thermodynamic properties Phase behaviorħ5.97 J/(mol K) and 4.2176 J/(g The calculator below can be used to estimate the density and specific weight of methanol at given temperature and atmospheric pressure. There are three 'answers' you would get: One molar volume for the liquid phase. Then, press enter until your answer converges. Structure and properties Structure and propertiesĤ92.215 kJ/mol O–H bond dissociation energy Thus, put the following into your TI calculator to solve for ¯¯ ¯V at 25C, or 298.15 K: (X X3 24.82017175X2 + 5.536X 0.16879264 3X2 49.6403435X +5.536) X. This page provides supplementary data to the article properties of water.įurther comprehensive authoritative data can be found at the NIST Chemistry WebBook page on thermophysical properties of fluids.
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