Chemistry, 25.09.2019 04:30, gedntrxAa

Which of the following is not an indication of a chemical reaction?
1.) heat is generated when two substances are combined.
2.) a solid quickly forms when two liquids are combined.
3.) a substance melts when sitting in the sun.
4.) a substance sours when sitting in the sun.

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Which of the following is not an indication of a chemical reaction?
1.) heat is generated wh...