Question

there are several differences between chemical and physical changes. which statement is true of a chemical change, but not true of a physical change? a chemical change can be easily changed back. a chemical change can combine substances without altering them. a chemical change can separate a mixture into its components. a chemical change can produce warmth.

Explanation:

In a chemical change, new substances are formed and energy - often in the form of heat (warmth) - can be released or absorbed. Physical changes only affect the physical state or appearance of a substance without changing its chemical composition. A chemical change is not easily reversible, substances are chemically combined or broken down in a chemical change, and separating a mixture into components is more related to physical separation methods in most cases. So, producing warmth is characteristic of a chemical change but not a general characteristic of a physical change.

Answer:

D. A chemical change can produce warmth.