Physical and Chemical Changes

Front

What are chemical properties?

Back

Chemical properties are characteristics that describe how a substance reacts with other substances, indicating its potential to undergo chemical changes.

Front

What are physical properties?

Back

Physical properties are characteristics of a substance that can be observed or measured without changing the substance's identity, such as color, odor, and melting point.

Front

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 melting ice or dissolving sugar in water.

Front

What is a chemical change?

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A chemical change is a process that involves the transformation of one or more substances into different substances, often accompanied by energy changes, such as burning wood or rusting iron.

Front

Give an example of a physical change.

Back

An example of a physical change is the melting of ice into water.

Front

Give an example of a chemical change.

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An example of a chemical change is the reaction of vinegar and baking soda to produce carbon dioxide gas.

Front

What happens to the properties of a substance during a chemical change?

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During a chemical change, the properties of the original substance change, and new substances with different properties are formed.

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What is the difference between a physical change and a chemical change?

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A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

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What is an indicator of a chemical change?

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Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.