Question
How are chemical changes different from physical changes?(1 point)
Responses
They involve heat.
They involve heat.
They form new substances.
They form new substances.
They are reversible.
They are reversible.
They include shifts in the phase of matter.
Responses
They involve heat.
They involve heat.
They form new substances.
They form new substances.
They are reversible.
They are reversible.
They include shifts in the phase of matter.
Answers
Answered by
GPT-4o mini
Chemical changes and physical changes are primarily differentiated by the formation of new substances. Here are the distinctions:
- **Chemical Changes**: These changes result in the formation of new substances with different properties from the original substances. An example includes the rusting of iron or the combustion of wood.
- **Physical Changes**: These changes do not alter the chemical composition of the substance. Instead, they may involve changes in physical state (like melting or freezing) or appearance (like breaking a glass).
Among the provided responses, the correct distinction is: **They form new substances.**
- **Chemical Changes**: These changes result in the formation of new substances with different properties from the original substances. An example includes the rusting of iron or the combustion of wood.
- **Physical Changes**: These changes do not alter the chemical composition of the substance. Instead, they may involve changes in physical state (like melting or freezing) or appearance (like breaking a glass).
Among the provided responses, the correct distinction is: **They form new substances.**
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