Question

match the following terms to the correct definition:
a dynamic condition in which two opposing changes occur at equal rates in a closed system
any part of a system with uniform composition and properties
a gas in contact with its liquid or solid phase
vapor
phase
equilibrium

Explanation:

1. For the first definition "A dynamic condition in which two opposing changes occur at equal rates in a closed system", this matches the definition of Equilibrium. In chemical and physical systems, equilibrium is the state where forward and reverse processes happen at the same rate, resulting in no net change in the system.
2. For the second definition "Any part of a system with uniform composition and properties", this is the definition of a Phase. A phase is a distinct part of a system with consistent composition and properties (like a solid phase, liquid phase, etc.).
3. For the third definition "A gas in contact with its liquid or solid phase", this is the definition of Vapor. Vapor specifically refers to a gas that is in equilibrium with its condensed (liquid or solid) phase.

Answer:

• "A dynamic condition in which two opposing changes occur at equal rates in a closed system" - Equilibrium
• "Any part of a system with uniform composition and properties" - Phase
• "A gas in contact with its liquid or solid phase" - Vapor