Thermal Energy in Chemical Reactions 7th Grade
The total kinetic energy of the tiny particles that make up matter
Thermal Energy
When a reaction absorbs heat, the product of the reaction becomes colder.
This is called an endothermic reaction.
When a reaction releases heat, the product of the reaction becomes hotter.
This is called an exothermic reaction.
How can you improve upon a design solution?
To improve a design solution, it should be tested and then modified on the basis of the test results.
Describe how photosynthesis is an endothermic chemical reaction.
photosynthesis is the endothermic chemical reaction because plants require energy from the sun to convert water and carbon dioxide into glucose and oxygen.
In a chemical reaction,
reactants form new substances with different properties.
Endothermic Reaction
A chemical reaction in which heat is absorbed
Exothermic Reaction
A chemical reaction in which heat is released
Product
A substance produced during a chemical reaction
Reactant
A substance that takes part in and undergoes change during a chemical reaction
Give an example of an exothermic and an endothermic reaction. Explain your examples.
An example of an endothermic reaction is the activation of a cold pack. It is caused by a chemical reaction that absorbs heat energy from the surroundings. An exothermic reaction is burning a log at a campsite. The burning of the log releases heat energy, which is why it is warmer and you can feel the heat.
The method of changing one or more chemical compounds
Chemical Process
A process that leads to the transformation of one set of chemical substances to another
Chemical reaction
The substances that are yielded from a chemical reaction
Products
The substances initially involved in a chemical reaction
Reactants
Exothermic reactions release energy. Before these reactions occur, where is the necessary energy stored?
The energy used for exothermic reactions to occur is stored in the chemical bonds of the reactants of the reaction.
Chemical Reaction
The process by which one or more substances change to produce one or more different substances
Thermal Energy
The total kinetic (motion) energy of the tiny particles that make up matter; the faster the particles move, the warmer the matter becomes
