Background Paragraph: When the temperature of reactants is higher, the rate of the reaction is faster. At higher temperatures, particles of reactants have more energy, so they move faster. As a result, they are more likely to bump into one another and to collide with greater force. For example, food spoils because of chemical reactions, and these reactions occur faster at higher temperatures (see the bread on the left in the Figure below ). This is why we store foods in the refrigerator or freezer (like the bread on the right in the Figure below ). The lower temperature slows the rate of spoilage. 
Story: Justin and Thomas are two college students conducting an experiment in their chemistry laboratory course.  They are mixing together acids and bases to produce sodium based compounds. Justin conducts his reactions at a high temperature, while Thomas conducts his reactions at a lower temperature.
If Justin wanted the rate of his reactions to be similar to Thomas's, should he increase or decrease the temperature of his reactions? If Thomas wanted the rate of his reactions to be similar to Justin's, should he increase or decrease the temperature of his reactions? In which person's reaction will the acid and base particles move faster? In which person's reaction will the acid and base particles move slower? In which person's reactions will the acid and base particles be less likely to collide with each other? In which person's reactions will the acid and base particles be more likely to collide with each other? Whose reactions will occur at a faster rate? Whose reactions will occur at a slower rate?