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A gas is insulated so that no heat enters or leaves while its state changes. That process is:
AIsobaric
BIsochoric
CAdiabatic
DIsothermal
Answer & Solution
Correct answer: C. Adiabatic
1. Insulation blocks the heat transfer entirely.
2. The state still changes because work is done.
3. The process is adiabatic.
_Source: OpenStax University Physics Volume 2, Chapter 3, The First Law of Thermodynamics._
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