Question

The temperature of the system decreases in an:

• A. Adiabatic Compression
• B. Isothermal Expansion
• C. Isothermal Compression
• D. Adiabatic Expansion

Answer 1

The correct option is D Adiabatic Expansion

In an adiabatic process heat is neither added nor removed from the system. So, the work done by the system (for expansion) in an adiabatic process will result in decrease of internal energy of that system (from first law of thermodynamics).
As internal energy is directly proportional to the change in temperature, there will be a temperature drop in an adiabatic expansion process.