Question
When gases are heated, they:
When gases are heated, they:
- Expand less than liquids but more than solids
- Expand less than solids but more than liquids
- Do not expand
- Both b and c
Hint:
The expansion of substances is dependent on the property of intermolecular spaces in different states of elements.
The correct answer is: Expand less than solids but more than liquids
- When gases are heated, they expand less than solids but more than liquids.
- The expansion of elements or substances occurs when the molecules gain kinetic energy and start moving due to excitement. In the case of solids, this kinetic energy is strong but since the molecules are tightly packed, there is very little space for their movement due to which they are unable to expand more.
- On the other hand, liquids are less densely packed than solids, thus, they expand more than them. And lastly, gases being the least dense, with huge intermolecular spaces, allow the molecules to move freely and therefore expand the most on heating.
The expansion of gases is a property that is widely used in industries for carrying out various purposes.
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