Some of the physical changes of matter can be arranged in pairs to show that they are reversible reactions. a. Identify a pair of physical changes between a solid and liquid. b. Identify two pairs of physical changes between a liquid and a gas.
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>>>> A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not
>>>> Mixtures can be separated through physical changes, including techniques such as chromatography, distillation, evaporation, and filtration. Physical changes do not alter the nature of the substance, they simply alter the form. Pure substances, such as compounds, can be separated through chemical changes
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ok. here is your answer.
according to your definition of physical change:-
it is reversible change. no new substance is formed .
the word reverse means 'opposite '.
- So,when solid is heated it gets converted into its liquid state.
- when liquid is cooled it gets converted into its solid form. so,in this the condition is being reversed.so it is reversible change.
- Similarly,liquid when heated it gets converted into its gaseous form.
- when,gas is cooled,it gets converted into its liquid form. here also,the condition is being reversed.
- Hence,it is a reversible change.
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