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During a lab activity, students prepared two solutions separately at the same temperature. Later they mixed the solutions and the temperature dropped. Why?
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During a lab activity, students prepared two solutions separately at the same temperature. Later they mixed the solutions and the temperature dropped. Why?

User Dodjs
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This at be due to a chemical change. For example, when some chemical elements mix, the change causes heat. This is the same, but the opposite. Hope this helps!
User Roland Illig
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