Question

why do solids have a definite volum,?

Answer 1

Any matter that is a solid has a definite shape and a definite volume. The molecules in a solid are in fixed positions and are close together. Although the molecules can still vibrate, they cannot move from one part of the solid to another part. As a result, a solid does not easily change its shape or its volume.

Answer 2

solids have definite volume because they cannot be separated easily by simple forces. their molecular attraction is so high that all the particles in the solid stay together every time. even if you heat it in 1500 degree Celsius.