Ohio Assessment for Educators (OAE) Integrated Science (024) Practice Exam

Which diagram illustrates changes in the state of matter in relation to temperature and pressure?

1. Phase Change Diagram

2. Molecular Structure Diagram

3. Energy Transfer Diagram

4. Reaction Coordinate Diagram

The correct answer is: Phase Change Diagram

A phase change diagram effectively illustrates changes in the state of matter as they relate to temperature and pressure. This type of diagram, often represented as a phase diagram, showcases the different states of matter—solid, liquid, and gas—and the conditions under which these states change from one to another. In a phase diagram, temperature is typically plotted on one axis and pressure on the other, allowing for a clear visual representation of how the state of a substance can vary with changes in these two variables. Key features include phase boundaries where phase transitions occur, such as melting, boiling, or sublimation, indicating the temperature and pressure conditions that lead to changes in state. Understanding this diagram is crucial for analyzing phenomena in thermodynamics and physical chemistry, as it provides insight into the behavior of materials under various environmental conditions. The other options, while they represent different scientific concepts, do not specifically address the relationship between temperature, pressure, and the state of matter in the same comprehensive way.