Question

Which of the following thermodynamic processes can be reversed?

• A. Heating of an oven.
• B. Combustion of petrol.
• C. Free expansion of gases.
• D. Isothermal expansion of an ideal gas in a cylinder with a frictionless piston.

Answer 1

The correct option is D Isothermal expansion of an ideal gas in a cylinder with a frictionless piston.

Isothermal expansion of an ideal gas in a cylinder with a frictionless piston.

Isothermal Process. For a constant temperature process involving an ideal gas, pressure can be expressed in terms of the volume: The result of a heat engine process leading to expansion from to gives the work expression.In an ideal gas, all the collisions between molecules or atoms are perfectly elastic and no intermolecular force of attraction exists in an ideal gas because of the molecules of an ideal gas move so fast and they are so far away from each other that they do not interact at all. In the case of real gas, they have negligible intermolecular attractive forces. Ideal gas does not exist naturally. However, gases behave most ideally at high temperature and low-pressure conditions. The entire internal energy in an ideal gas is in the form of kinetic energy of the particles and any change in the internal energy results in a change of temperature.