Water into water vapor is a physical change
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In the matter of a substance, there is a process of change.
2 changes occur in the mater, namely: changes in physics and chemical changes
Classification uses the principle of the initial and final state of the substance.
Changes in physics are changes in the matter which in the process do not cause new substances. So the properties of the particles remain the same.
Generally, the physical changes that occur are changes in shape/size and size, changes due to heating, or changes in volume
Chemical changes are changes in the process produce new substances that are different from the initial/forming substances. Chemical changes are usually known as chemical reactions. So there are products/reactions and reactants
So in chemical changes, there is a change in the molecule/particle
If we see the answers
1. ripe banana
In the process of ripening bananas, there are changes in skin color (green to yellow due to loss of chlorophyll), changes in sugar levels (increase in fructose/glucose) and softness of fruit flesh
So that the ripening process of bananas is a chemical change
2. Hydrogen burning in the air
Burning is a chemical process that involves fuel and oxidizing agents that will produce products and heat (removing heat)
Burning hydrogen will produce a water vapor compound
H₂ + O₂ ---> H₂O
So combustion of hydrogen is a chemical change
3. The reaction of zinc with acid
This reaction is one of the reduction and oxidation reactions where zinc is the reducing agent that undergoes oxidation and acid reaction as an oxidizer which undergoes a reduction reaction
Examples of reactions with HCl (hydrochloric acid)
Zn (s) + 2HCI (aq) ⇒ ZnCl₂ (aq) + H₂ (g)
Hydrogen gas and zinc chloride are formed here
So zinc reacts with acids including chemical changes
4. water becomes water vapor
This process is included in the evaporation process, where there is a change in the liquid phase (water) into a gas (water vapor) through the heating process. So the nature of the particles is the same and the shape can be made back to the original substance. The only thing that changes is the physical.
So water into water vapor is a change in physics
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The difference between physical and chemical change https://brainly.in/question/1420958
example of a chemical change https://brainly.com/question/9388643
examples of chemical changes https://brainly.com/question/11189422
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Grade: high school
Subject: chemistry
Chapter: material changes
Keywords: chemical change, physical change, hydrogen combustion, evaporation, ripe banana, reduction, oxidation, zinc, metal
