11. How does change in temperature results in change of state?
12. With the help of a diagram explain the compression taking place in gases.
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11)
When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation). ... When the pressure exerted on a substance increases, it can cause the substance to condense.
12)
Explanation: Gases can be compressed, because they just take up whatever space is available to them. This is because gases consist of molecules that have too little interactions between them to stick together. They just move along until they collide, either with a wall or with each other.
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