Answered

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A sample of a compound is added to distilled water in a clean beaker. A reaction occurs
and the water temperature drops rapidly. Which of the following statments best supports this
observation?

A. An endothermic reaction occurred

B. The water was originally warmer than the compound

C. An exothermic reaction occurred

D. The beaker was contaminated by another compound

A Sample Of A Compound Is Added To Distilled Water In A Clean Beaker A Reaction Occurs And The Water Temperature Drops Rapidly Which Of The Following Statments class=

Sagot :

Answer: An endothermic reaction occurred

Explanation:

A sample of a compound is added to distilled water in a clean beaker. A reaction occurs and the water temperature drops rapidly which indicates that an endothermic reaction occurred. Hence, option A is correct.

What is an endothermic reaction?

Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.

An endothermic reaction means that heat is absorbed during this reaction (enthalpy change value has a positive sign).

During the endothermic reaction heat is absorbed from the surroundings (here, water) and hence the temperature of the water in which the reaction is taking place decreases.

Hence, option A is correct.

Learn more about endothermic reaction here:

https://brainly.com/question/8430533

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