The kinetic energy of carbon dioxide molecules in a can of soda is much higher when it is chilled than when it is at room temperature.
true
false

The answer to your question is: false

Explanation:

Kinetic energy is the energy an object has due to its motion, then when molecules have a higher movement the kinetic energy will be higher and when the molecules do not move, the kinetic energy will be lower.

Temperature increses movement of molecules, so, when a can is chilled, the kinetic energy will be lower than when it is at room temperature.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.