Question

In a thermodynamic process, there is no exchange of heat between the system and surroundings. Then the thermodynamic process is

• A. isothermal
• B. isobaric
• C. isochoric
• D. adiabatic

Hint:

Logic Tip: Adiabatic processes usually occur very quickly or in well-insulated systems, preventing heat transfer during the change of state.

Answer 1

The Correct Option is D

Concept: In thermodynamics, processes are classified based on heat exchange. An adiabatic process is one in which no heat is exchanged between the system and its surroundings.
Step 1: Given condition It is stated that there is no heat transfer: \[ Q = 0 \]
Step 2: Identify the process By definition:

• If $Q \neq 0$ $\rightarrow$ heat exchange occurs
• If $Q = 0$ $\rightarrow$ no heat exchange occurs

Hence, the process is adiabatic.
Step 3: Additional insight (First Law) From the first law of thermodynamics: \[ \Delta U = Q - W \] For an adiabatic process: \[ Q = 0 \Rightarrow \Delta U = -W \] This means the change in internal energy is due only to work done. Conclusion: \[ \boxed{\text{Adiabatic process \]