Multiple Choice
If energy is added to a boiling liquid at its boiling point, what will happen?
8. Thermochemistry
Nature of Energy
Multiple Choice
When a log burns in a campfire, which energy transformation primarily occurs?
A
Thermal energy is converted to chemical energy.
B
Chemical energy is converted to thermal and light energy.
C
Kinetic energy is converted to electrical energy.
D
Potential energy is converted to nuclear energy.
Verified step by step guidance1
Identify the type of energy stored in the log before it burns. The log contains chemical energy stored in the bonds of its molecules.
Understand what happens during combustion: the chemical bonds in the log break and new bonds form, releasing energy.
Recognize the forms of energy released during burning: primarily thermal energy (heat) and light energy (flames).
Match the energy transformation: chemical energy in the log is converted into thermal and light energy during combustion.
Conclude that the correct energy transformation is: Chemical energy is converted to thermal and light energy.
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