Edexcel IAL Chemistry 7.3 Anomalous properties of water

Separate the two explanations: extra energy is needed to overcome hydrogen bonds on heating, while freezing spaces molecules farther apart in an open lattice.

Exam points

Explain water's high boiling point by the energy needed to overcome hydrogen bonds.
Link ice's lower density and expansion on freezing to an open hydrogen-bonded lattice.

[Maximum number: 1]

Which is not correct about ice?

ice has a lower density than water

$\mathrm{H}_{2} \mathrm{O}$ molecules are further apart in ice than in water

the H-O-H bond angle is the same in ice and in water

$\mathrm{H}_{2} \mathrm{O}$ molecules in ice are held together by hydrogen bonds

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7.3—The following anomalous properties of water resulting from hydrogen bonding: i its high melting and boiling temperature when question 1