Chapter 11. States of Matter; Liquids and Solids. Overview. Changes of State Phase transitions Phase Diagrams Liquid State Properties of Liquids; Surface tension and viscosity Intermolecular forces; explaining liquid properties Solid State
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States of Matter; Liquids and Solids
H2O(l) H2O(g) or
H2O(g) H2O(l) or
E.g. Determine normal boiling point of chloroform if its heat of vaporization is 31.4 kJ/mol and it has a vapor pressure of 190.0 mmHg at 25.0°C.
E.g.2. The normal boiling point of benzene is 80.1°C; at 26.1°C it has a vapor pressure of 100.0 mmHg. What is the heat of vaporization?
H2O(l) H2O(g) DH = 40.7 kJ
H2O(s) H2O(l) DH = 6.01 kJ
E.g. Start with a solution consisting of 50.0 g of H2O(s) and 50.0 g of H2O(l) at 0°C. Determine the heat required to heat this mixture to 100.0°C and evaporate half of the water.
E.g. Polonium crystallizes according to the primitive cubic structure. Determine its density if the atomic radius is 167 pm.
E.g.2 Calculate the radius of potassium if its density is 0.8560 g/cm3 and it has a BCC crystal structure.