Exothermic Reaction Lab Report

All chemical reactions are processed through energy exchanges. Chemical reactions either absorb energy or release energy into their surroundings. In thermodynamics, endothermic reactions absorb energy where exothermic reactions release energy. In this experiment, we will be observing the chemical reactions that occur when a specific liquid is combined with a specific solid. We will measure the temperature of the liquid before the solid is added. Then we will measure the temperature of the liquid after the solid is added. We, then, will record the results, graph the temperature changes if any, and draw a conclusion whether the reaction is endothermic or exothermic reaction.

Experiment/Investigation Plan (Energy Changes in Chemical Reactions, 2011)
Problem/Question: Which chemical reactions are exothermic and which ones are endothermic? Why?
Prior Knowledge/Research: Exothermic reactions give off heat, for example, fireworks. Endothermic reactions absorb heat; heating water on a stove thus the water turns into gas.
Prediction/Hypothesis: If water is combined with ice or salt then it absorbs energy. If white vinegar is combined with baking soda or steel wool, then it gives off energy. If hydrogen peroxide is combined with dry yeast, then it absorbs energy.