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Endothtermic And Exothermic Reaction Lab Report

Decent Essays
Introduction:

Chemical reactions make new things by rearranging other things. In a chemical reaction, the main change that occurs relates to the way atoms are bonded to each other, in order to change those connections, bonds must be broken and new bonds be formed.
It’s important to understand that it takes energy to break bonds and that energy is released when bonds are formed.
Chemical reactions that release energy are called exothermic reactions, these reactions are observed by an increase in temperature of the reaction mixture.
Chemical reactions that absorb energy are called endothermic reactions, these reactions are observed by a decrease in temperature of the reaction mixture.

Endothermic and Exothermic reactions release or absorb energy, the graph above shows the way in which the chemical energy changes.

In this experiment, we investigate the change in temperature caused by adding a chemical substance into the water and dissolving it. The results recorded in the table below show that our hypothesis is correct.

Aim:
To investigate temperature changes that occur as a result of exothermic and endothermic reactions.

Hypothesis:
It’s predicted that when adding the chemical substance into the water, energy will be released or absorbed, this will be observed by a temperature change, therefore, there would be an exothermic or endothermic reaction.

Materials: solid ammonium chloride, solid calcium chloride, 100 ml beaker, water, thermometer.

Method:

Add 30 ml
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