Many chemical processes involve substances in either the liquid or gaseous state. Which of the following statements is correct?
A specific mass of a gas has a fixed volume at room temperature.
A specific mass of liquid has a fixed volume at room temperature.
25 cm³ of gas contains more particles than 25 cm³ of liquid.
Liquid particles placed inside a sealed container have fixed positions
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A liquid has a constant volume, but its shape conforms to the shape of its container. Consider a sample of milk. Its volume stays the same, whether you put it in a saucer for the cat to drink or in a glass for yourself; clearly its shape changes to match the shape of the container. A gas changes both its shape and volume to conform to the shape and volume of its container. Consider a sample of air. It will fill an empty room, a balloon, a tire, or a rubber raft. Its shape and volume conform to the shape and volume of the container in which it is placed.
Constancy of volume, shape, and mass in the three states of matter: (a) solid, (b) liquid, (c) gas.
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