What happens to the temperature of a gas when it expands adiabatically?
Correct Answer: Temperature decreases.
- Step 1: Understand what adiabatic means. Adiabatic means that no heat is exchanged with the surroundings.
- Step 2: Know that when a gas expands, it pushes against something (like a piston). This is called doing work.
- Step 3: Realize that when the gas does work, it uses energy from itself.
- Step 4: Since the gas is not getting heat from outside (adiabatic), it loses energy.
- Step 5: When the gas loses energy, its temperature decreases.
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