Which of the following diagrams represents a chemical change?

검증된 단계별 안내

Understand the difference between a physical change and a chemical change. A chemical change results in the formation of one or more new substances with different properties, while a physical change affects only the physical properties without changing the substance's identity.

Look for signs of a chemical change in the diagrams, such as color change, gas production (bubbles), formation of a precipitate, temperature change, or a change in composition indicating new substances formed.

Identify if the diagram shows breaking and forming of chemical bonds, which is a hallmark of chemical changes, as opposed to just changes in state or shape which are physical changes.

Eliminate diagrams that only show physical changes like melting, freezing, dissolving, or mixing without new substances being formed.

Select the diagram that clearly depicts a chemical reaction or transformation, such as reactants turning into products with different chemical formulas or evidence of a chemical reaction.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Chemical Change

A chemical change involves the transformation of substances into new products with different chemical properties and compositions. Indicators include color change, gas production, formation of a precipitate, or energy change. Unlike physical changes, chemical changes are usually irreversible.

Physical Change

A physical change affects the form or appearance of a substance without altering its chemical identity. Examples include changes in state (melting, freezing), shape, or size. Physical changes are generally reversible and do not produce new substances.

Interpreting Diagrams of Chemical Processes

Diagrams representing chemical changes often show reactants converting into different products, sometimes with symbols indicating energy changes or gas release. Understanding these visual cues helps distinguish chemical changes from physical ones by identifying new substances or bonds formed.