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Heating Curves Tutorial: How to Calculate enthalpy changes in Heating & Cooling | Crash Chemistry
17 lis 2023 · The density of water (and iced tea) is 1.00 g/mL over the range 0°C–20°C, the specific heats of liquid water and ice are 4.184 J/(g•°C) and 2.062 J/(g•°C), respectively, and the enthalpy of fusion of ice is 6.01 kJ/mol.
Revision notes on 1.8.2 Enthalpy Level Diagrams for the Edexcel A Level Chemistry syllabus, written by the Chemistry experts at Save My Exams.
We can use the phase diagram to identify the physical state of a sample of water under specified conditions of pressure and temperature. For example, a pressure of 50 kPa and a temperature of −10 °C correspond to the region of the diagram labeled “ice.”
What phase changes will take place when water is subjected to varying pressure at a constant temperature of 0.005 °C? At 40 °C? At −40 °C? Answer. At 0.005 °C vapor to solid to liquid. The triple point is at +0.01 °C and the freezing point is ever so slightly lower at 0.00 °C.
We can define the activation energy as ‘ the minimum amount of energy needed for reactant molecules to have a successful collision and start the reaction’. The energy level diagram for the reaction of hydrogen with chlorine to form hydrogen chloride gas.
Figures and tables showing how the properties of water changes along the boiling/condensation curve (vapor pressure, density, viscosity, thermal conductivity, specific heat, Prandtl number, thermal diffusivity, entropy and enthalpy).
