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An enthalpy–entropy chart, also known as the H–S chart or Mollier diagram, plots the total heat against entropy, [1] describing the enthalpy of a thermodynamic system. [2] A typical chart covers a pressure range of 0.01–1000 bar , and temperatures up to 800 degrees Celsius . [ 3 ]
Date/Time Thumbnail Dimensions User Comment; current: 11:09, 30 December 2011: 742 × 700 (26 KB): Pieter Kuiper: Reverted to version as of 22:48, 16 January 2011 revert to version in English
English: Phase diagram of CO2 (carbon dioxide). X axis is temperature in kelvin; Y axis is pressure in bar. X axis is temperature in kelvin; Y axis is pressure in bar. Esperanto: Premo-temperatura fazodiagramo de karbona duoksido
Std enthalpy change of fusion, Δ fus H o: 9.019 kJ/mol at triple point [6] Entropy change of fusion, Δ fus S: 40 J/(mol·K) at triple point Std enthalpy change of vaporization, [7] [8] Δ vap H o: 15.326 kJ/mol at 215.7 K (−57.5 °C) (348 J/g) Std entropy change of vaporization, Δ vap S o: 70.8 J/(mol·K) Solid properties Std enthalpy ...
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The main feature of thermodynamic diagrams is the equivalence between the area in the diagram and energy. When air changes pressure and temperature during a process and prescribes a closed curve within the diagram the area enclosed by this curve is proportional to the energy which has been gained or released by the air.
The pressure on a pressure-temperature diagram (such as the water phase diagram shown above) is the partial pressure of the substance in question. A phase diagram in physical chemistry , engineering , mineralogy , and materials science is a type of chart used to show conditions (pressure, temperature, etc.) at which thermodynamically distinct ...
Molar enthalpy of zinc above 298.15 K and at 1 atm pressure, showing discontinuities at the melting and boiling points. The Δ H °m of zinc is 7323 J/mol, and the Δ H °v is 115 330 J/mol. Enthalpy change for a chemical reaction