The Chemistry of Water (Grade 11 NSC Matric Physical Sciences): Quizzes

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The Chemistry of Water
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What is the shape of a water molecule?

Bent or angular

What type of charge does the oxygen atom have in a water molecule?

Partial negative (δ-)

Hydrogen bonds in water are examples of which type of force?

Intermolecular forces

What does specific heat measure?

Energy to raise temp of unit mass by 1°

Why does water have a high specific heat?

Strong H-bonds must be disrupted first

What is water's boiling point at standard pressure?

100°C

What is the heat of vaporisation of water?

40.65 kJ\cdotpmol−140.65 \text{ kJ·mol}^{-1}

How does the density of ice compare to liquid water?

Ice is less dense

Why does ice float on water?

H-bonds create open structured pattern

What role do oceans play due to water absorbing infrared radiation?

Act as heat reservoirs

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