객관식
Why is it important to separate materials from a mixture?
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1. Intro to General Chemistry
Physical & Chemical Changes
객관식
Which type of change occurs when water is boiled?
A
Physical change
B
Both physical and chemical change
C
Neither physical nor chemical change
D
Chemical change
검증된 단계별 안내1
Understand the difference between physical and chemical changes: A physical change affects the form or physical properties of a substance without changing its chemical composition, while a chemical change results in the formation of one or more new substances with different chemical properties.
Consider what happens when water is boiled: The water changes from liquid to gas (steam), which is a change in its physical state or phase.
Recognize that during boiling, the molecular structure of H\_2O remains the same; no new substances are formed, so the chemical identity of water does not change.
Conclude that boiling water is a physical change because it involves a change in state without altering the chemical composition.
Therefore, the correct classification for boiling water is a physical change.
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