Why does the phase diagram of water have a negative slope?
2016年8月4日 · Unlike most materials, water is more dense as a liquid than as a solid. So increasing pressure favors the liquid instead of the solid. Because water tends to form hydrogen bonds, its (ordinary) solid phase does not have a close-packed structure. The molecules in water ice take up extra space in order to make their hydrogen bonds line up and make the most …
Phase Diagrams - Chemistry - Socratic
For example, a phase diagram for water will tell you which state water will be in at a given temperature and pressure. You could also use the phase diagram to determine the conditions which would lead to different phase change processes (melting, boiling, sublimation, deposition etc.)
How is a phase diagram for water different? - Socratic
2014年2月11日 · A phase diagram is graphical representation that lets you work out exactly what phases are present at any given temperature an pressure. Every point in the diagram represents a possible combination of temperature and pressure for a closed system. Typically, a phase diagram has pressure on the y-axis and temperature on the x-axis. The regions separated by …
Water Phase Diagram: Mathematically Modeling and Validating
2020年10月4日 · A water phase diagram is mathematically modeled using the Clausius-Clapeyron equation, which relates the temperature and pressure at which a substance changes state. This equation takes into account the enthalpy and entropy of the substance, as well as the temperature and pressure at which the phase change occurs.
How does the water phase diagram differ from those of most
2017年2月19日 · The line separating the solid and liquid phases has a negative slope. > A phase diagram is a graph that shows what phases are present at any given temperature and pressure. It usually has pressure on the vertical axis and temperature on the horizontal axis. The regions separated by the lines tell us the conditions of T and P that are will produce a gas, a liquid, or …
Phase diagram of water in real life - Physics Forums
2017年11月17日 · From the pure water phase diagram, we see that at a temperature of 20 °C and absolute pressure of 1 atm (NTP), the water vapor pressure is just 0.00231 atm. When we study the phase diagram of water, we would use 1 atm (not 0.00231 atm), and obtain that water is supposed to be a liquid (not a vapor).
How do I make a phase diagram for water? - Socratic
2017年1月17日 · By knowing where the normal boiling and freezing points are (at "1 atm"), critical point and triple point are, and the slope of the liquid-solid, liquid-vapor, and solid-vapor coexistence curves. Note that the phase diagram is simply a pressure vs. temperature graph. We know that T_f = 0^@ "C" at "1 atm" and T_b = 100^@ "C" at "1 atm" are the normal freezing …
How do you read the phase diagram of water? - Socratic
2017年2月17日 · Of course, we can draw the ordinate P=1*atm, and we can see the phase transitions of water at 1*atm, i.e. at 0 ""^@C and 100 ""^@C. The fact that the slope of the ice-water transition is NEGATIVE is a very unusual property, and it can show that ice is less DENSE than water (I think the slope of the graph is highly exaggerated!).
What are the phase diagrams of water and carbon dioxide?
2017年11月23日 · Each line represents phase changes between respective boundaries. The triple point is where all the phases are at equilibrium. Phase changes are usually isothermal, so temperature is constant until every molecule has attained high enough heat (e.g. kinetic energy) to surpass the intermolecular forces characteristic of each phase at varying strengths.
How is water's phase diagram unique? - Socratic
2018年8月13日 · How is water's phase diagram unique? Chemistry Phases of Matter Phase Diagrams. 1 Answer anor277