Temperature, Kinetic Theory, and the Gas Laws

Part 11: Temperature, Kinetic Theory, and the Gas Laws

This part introduces the concepts of temperature, heat, and the microscopic behavior of matter. You will learn how temperature is measured, why materials expand when heated, how gases behave under different conditions, and how the motion of atoms and molecules gives rise to observable properties such as pressure and temperature. These ideas form the foundation of thermodynamics and explain many physical and biological processes.

The concepts developed in this part are especially relevant to the life and health sciences. Temperature regulation is essential for maintaining homeostasis, while gas laws describe the behavior of air in the lungs, medical gases, and respiratory equipment. You will also examine phase changes, evaporation, humidity, and boiling, all of which play important roles in physiology, environmental science, and healthcare. Understanding the kinetic theory of matter provides a microscopic explanation for these macroscopic phenomena and prepares you for the study of heat, thermodynamics, and energy transfer in the next part.

This part contains the following chapters:

92. Introduction to Temperature, Kinetic Theory, and the Gas Laws
93. Temperature
94. Thermal Expansion of Solids and Liquids
95. The Ideal Gas Law
96. Kinetic Theory: Atomic and Molecular Explanation of Pressure and Temperature
97. Phase Changes
98. Humidity, Evaporation, and Boiling