Home > Science Experiments > Chemical Energy - Experiment 2 - Exothermic or Endothermic: Determining whether various chemical reactions are exothermic or endothermic

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Experiment 2
Exothermic or Endothermic: Determining whether various chemical reactions are exothermic or endothermic

Purpose/Hypothesis

In this experiment, you will measure the heat energy released or absorbed as four different chemicals (see the materials list) are mixed with water. You expect that the temperature of the solution will go up if the reaction is exothermic and go down if the reaction is endothermic. Before you begin, make an educated guess about the outcome of each reaction based on your knowledge of the chemicals and reactions involved. This educated guess, or prediction, is your hypothesisAn idea in the form of a statement that can be tested by observation and/or experiment.. A hypothesis should explain these things:

• the topic of the...

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1. Introduction
2. Experiment 1 - Rusting: Is the chemical reaction exothermic, endothermic, or neither?
3. Experiment 2 - Exothermic or Endothermic: Determining whether various chemical reactions are exothermic or endothermic
4. Design Your Own Experiment