how are physical and chemical changes the same?
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Chemical changes and physical changes. Chemical changes happen when chemical reactions occur. They involve the formation of new chemical elements or compounds . ... In a physical change, a substance simply changes physical state , eg from a solid to a liquid.
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A physical property is an aspect that can be observed or measured without being changed. A chemical property may only be observed by changing the chemical identity or substance.
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Physical changes are related to physical properties since some measurements require that changes be made. Melting Point: As solid matter is heated it eventually melts or changes into a liquid state at the melting point. ... In all three states the same molecules of water (H2O) are present.
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Both: They both invlove changes in the state of matter. They both have energy changes. There are new things made either way, no matter if the chemical composition is changed or not.
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A chemical change occurs whenever matter changes into an entirely different substance with different chemical properties. ... Because chemical changes result in different substances, they often cannot be undone. Some chemical changes can be reversed, but only by other chemical changes.
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Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
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chemical properties are characteristics that describe a substance's ability to change into different substances, and physical properties are characteristics that can be observed without changing it into another substance.
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List some examples of physical change. Physical change involved tearing, breaking, grinding a state of matter, changing the state of matter and dissolving a substance. ... Some examples of chemical change is burning, rusting of iron, souring of milk and decaying of food.
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A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.
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Chemical Changes Versus Physical Changes Physical changes are usually about physical states of matter. Chemical changes happen on a molecular level when you have two or more molecules that interact. Chemical changes happen when atomic bonds are broken or created during chemical reactions.
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Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Chemical properties are only observed during a chemical reaction and thus changing the substance's chemical composition.
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Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. ... A physical change is a change in the state or properties of matter without any accompanying change in its chemical composition (the identities of the substances contained in the matter).
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Physical versus chemical Sometimes it can be useful to distinguish between different types of properties. Physical properties refer to properties that can be observed or measured without changing the composition of the material. Examples include colour, hardness and smell and freezing, melting and boiling points.
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The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
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A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.
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A physical reaction occurs when molecules undergo a molecular rearrangement to produce a physical change. The molecules are not chemically altered. ... So, the difference is that with a physical reaction, a chemical change in the molecule is not observed, but a physical change is observed.
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In a chemical change, a new substance is made, like when you burn a candle. In a physical change, no new substance is made, like when water turns to ice.