Take a small piece of magnesium in a test tube. Add a few drops of dilute hydrochloric acidin it. chemical reaction takes place. Touch the bottom of the test tube it fount to be hot. Why?
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Explanation:
- When Dilute Hydrochloric acid is added to Magnesium, it undergoes displacement reaction and the reaction is as follows:
Mg + HCl ➝ MgCl₂ + H₂
- This reaction is a exothermic reaction. It means that Electrons are liberated in the form of heat.
- Exothermic reaction is a type of reaction in which the energy is liberated in the form of heat.
- Heat is evolved out and there is an overall increase in temperature.
Due to this reaction taking place, the test tube in which the reaction has happened becomes hot.
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