Physical and Chemical Properties & Changes

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What is a chemical change?

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A chemical change is a process where substances react to form new substances with different properties, often indicated by changes such as temperature, color, or the formation of gas.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in shape, state, or texture.

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What is a chemical property?

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A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as reactivity, flammability, or toxicity.

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What is a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity, such as color, melting point, or boiling point.

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What indicates a chemical change?

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Indicators of a chemical change include changes in temperature, color, the formation of gas, or the production of a precipitate.

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What is reactivity?

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Reactivity is a chemical property that describes how readily a substance undergoes a chemical reaction with other substances.

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What is boiling point?

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Boiling point is the temperature at which a liquid turns into vapor, and it is a physical property, not a chemical property.

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What is rusting?

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Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide (rust).

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What is flammability?

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Flammability is a chemical property that describes how easily a substance can ignite and burn in the presence of oxygen.

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What is the difference between physical and chemical properties?

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Physical properties can be observed without changing the substance's identity, while chemical properties can only be observed during a chemical reaction.