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Which statement best describes the physical changes that occur when liquid water freezes and then melts again?
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1. Intro to General Chemistry
Physical & Chemical Changes
Scelta multipla
During which of the following processes does the space between particles tend to increase?
A
Melting of ice
B
Compression of a gas
C
Condensation of steam
D
Freezing of water
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Understand that the space between particles is related to the phase of the substance and how tightly the particles are packed together.
Recall that melting of ice involves changing from solid to liquid, where particles gain energy and move apart, increasing the space between them.
Recognize that compression of a gas decreases the space between particles because the gas particles are forced closer together.
Know that condensation of steam (gas to liquid) decreases the space between particles as gas particles come closer to form a liquid.
Understand that freezing of water (liquid to solid) decreases the space between particles as particles arrange into a fixed, closely packed structure.
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