A thermodynamic process is a process in which a system changes from one thermodynamic state to another due to transfer of heat, work or both.
The condition of a system described by variables such as pressure, volume and temperature is called the state of the system.
A process in which the temperature remains constant throughout the process.
Example: Slow expansion of gas in contact with a heat reservoir.
A process in which no heat is exchanged between the system and surroundings.
Example: Rapid compression or expansion of gas.
A process in which pressure remains constant.
Example: Heating gas in an open container.
A process in which volume remains constant.
Example: Heating gas in a rigid container.
Q1. A thermodynamic process involves change in: A) Shape only B) Colour only C) State of the system D) Mass only Answer: C Q2. In an isothermal process, which quantity remains constant? A) Pressure B) Volume C) Temperature D) Internal energy Answer: C Q3. In an adiabatic process: A) Temperature remains constant B) Pressure remains constant C) No heat is exchanged D) Volume remains constant Answer: C Q4. Which process occurs at constant pressure? A) Isothermal B) Adiabatic C) Isochoric D) Isobaric Answer: D Q5. Heating a gas in a rigid container is an example of: A) Isothermal process B) Adiabatic process C) Isobaric process D) Isochoric process Answer: D Q6. Rapid expansion of gas is considered: A) Isothermal B) Adiabatic C) Isobaric D) Isochoric Answer: B Q7. Which thermodynamic process has constant volume? A) Isothermal B) Isobaric C) Isochoric D) Adiabatic Answer: C Q8. P–V diagram is used to represent: A) Electrical process B) Chemical reaction C) Thermodynamic process D) Motion of bodies Answer: C
Change of state of a system due to heat or work interaction.
MCQs are frequently asked on identification of processes and constant quantities.
