Question

Which is an adiabatic process?

• A. The free expansion of a gas into a vacuum.
• B. The reversible isothermal expansion of an ideal gas.
• C. The slow compression of a gas in a cylinder fitted with a frictionless piston
• D. The rapid compression of a gas in a cylinder fitted with a frictionless piston.

Hint:

In an adiabatic process, there is no heat transfer, and the system's energy changes only due to work.