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Describe what happens at the molecular level when a substance is heated first to its melting point and then to its boiling point

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Answer:

MELTING. When a solid is heated, the particles are given more energy and start to vibrate faster. At a certain temperature, the particles vibrate so much that their ordered structure breaks down. At this point the solid melts into liquid.

Explanation:

adioabiola

Melting point

When a substance is heated, more energy is provided until the particles start to break free of the structure. The particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid.

Bioling point

When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. However, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.

How a substance change at it's melting and boiling point

Generally at the molecular level,

  • When a substance is boiled, the molecules are separated completely.

  • When one melt a substance, you are only slightly separating the molecules.. Because to change the state from solid to liquid is less of a temperature increase than to change to state from liquid to gas. we

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