Quasi-static process

Definition

A quasi-static process is a thermodynamic process that happens infinitely slowly, ensuring the system remains in near-equilibrium at all times. It is an idealization used to simplify the analysis of processes in thermodynamics.

5 Must Know Facts For Your Next Test

1. In a quasi-static process, the system is always nearly in equilibrium, making it reversible.
2. The work done in a quasi-static process can be represented as $W = \int P \, dV$ where $P$ is pressure and $V$ is volume.
3. Real processes are not truly quasi-static but can be approximated as such if they happen slowly enough.
4. Quasi-static processes are essential for deriving fundamental thermodynamic equations and understanding state functions.
5. Heat transfer in a quasi-static process occurs in infinitesimally small amounts to maintain equilibrium.

Review Questions

• What is the main characteristic that distinguishes a quasi-static process from other types of thermodynamic processes?
• How does the concept of equilibrium play into defining a quasi-static process?
• Why are real-life processes often approximated as quasi-static in thermodynamic analyses?

Related terms

Reversible Process: A thermodynamic process that can be reversed without leaving any net change in either the system or its surroundings.

Thermodynamic Equilibrium: A state where macroscopic properties such as pressure, temperature, and volume remain constant over time.

State Function: A property whose value does not depend on the path taken to reach that specific value but only on the current state of the system.