The bonds in a substance breaks down in a phase change from liquid to gas and the molecules move independently of each other.
It is conventional to describe chemical bonds with the aid of elastic materials such as a rubber band. This analogy can only apply to covalent bonds between atoms in which the bonds between atoms are stretched.
However, in discussing the bonds in a substance when considering phase changes, this analogy breaks down because for a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.
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Answer:
1. kinetic energy
2. The particles within the system will have greater motion, and the temperature will increase.
3. Attractions occur due to electrostatic forces. When particles move fast enough, these forces can no longer keep particles together.
4. For a phase change from solid to liquid, the bonds do not break completely and particles can still slide past each other.
5. a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC
