Question

please answer all the questions no 1 2 3 and 4

Answer 1

Answer:

hi.....

Explanation:

1) it expands due to the pressure aqupiced between the solid molecules

2) The liquid in the thermometer changes by the body temperature

sorry... I don't know partical theory......

Answer 2

1. When a solid is heated, then it's intermolecular force of attraction decreases as the molecules try to move randomly. Thus, a solid expands when it is heated.

2. Actually, it is dependent on thrmometer type, the glass tube of the thermometer is filled with either alcohol or mercury and when it gets hotter, the liquid get heated and expands and rise up taking up more space inside the tube, and when it get colder, the liquid compacts and move down the tube.

This rise an fall of the liquid, indicates the temperature.

3. The particles are closely packed in solids as compared to gases and have less intermolecular spaces and hence cannot be compressed due to forces and the force of attraction between particles is very high.

4. Liquid don't have a definite shape but have a fixed volume... it need a container to store them and fills the container they maintain the same volume till the temperature changes also they can be compressed this is bcz.. of inter - molecular spaces more than solid but less than gas the inter - molecular force of attraction in liquids is weaker than solisd.

Gas neither have a fixed volume or nor a definite shape they are easy to compress due to max. inter - molecular space they expand to fill their containers.

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