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When a puddle of water evaporates on a sunny day, where does the energy required for evaporation primarily come from?
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8. Thermochemistry
Nature of Energy
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Which type of energy conversion occurs when gasoline is used to power a car?
A
Chemical energy to mechanical energy
B
Thermal energy to chemical energy
C
Mechanical energy to electrical energy
D
Electrical energy to chemical energy
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Identify the initial form of energy stored in gasoline. Gasoline contains stored energy in the form of chemical bonds, so the initial energy type is chemical energy.
Consider what happens when gasoline is burned in a car engine. The chemical energy in gasoline is converted through combustion, releasing energy that powers the engine.
Understand the output energy form in the car. The engine converts the released energy into mechanical energy, which moves the car.
Match the energy conversion process: gasoline's chemical energy is transformed into mechanical energy to power the car's movement.
Conclude that the correct energy conversion is from chemical energy to mechanical energy.
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