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Liquids and Solids Water. Objectives 1.Describe the structure of a water molecule. 2.Explain the physical properties of water in terms of the intermolecular.

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Presentation on theme: "Liquids and Solids Water. Objectives 1.Describe the structure of a water molecule. 2.Explain the physical properties of water in terms of the intermolecular."— Presentation transcript:

1 Liquids and Solids Water

2 Objectives 1.Describe the structure of a water molecule. 2.Explain the physical properties of water in terms of the intermolecular forces that exist between molecules. 3.Calculate the amount of heat energy absorbed or released when a quantity of water changes state.

3 Structure of Water Polar bonds sp 3 hybridization 105 o bond angle Hydrogen bonding

4 Structure of Water Liquid Solid

5 Structure of Water

6 Physical Properties of Water Water has a high melting (0 o C) and boiling point (100 o C)

7 Physical Properties of Water Water has a high specific heat. It can absorb or release large amounts of energy without its temperature changing significantly

8 Physical Properties of Water Water has a high heat of vaporization.

9 Physical Properties of Water Liquid water becomes less dense as it warms. Ice is less dense than liquid water.

10 Phase Changes Molar Heat of Fusion 6.01 KJ/mol Molar Heat of Vaporization KJ/mol

11 Heat Calculations 1.What quantity of heat is released when 506 g of liquid water freezes? 2. What mass of steam is required to release 4.97 x 10 5 KJ of heat energy on condensation?


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