This physics course lays out the basic concepts you need to master to understand thermodynamics. We first discuss the zeroth law of thermodynamics which establishes the concept of thermal equilibrium between systems. We then move on to the different temperature scales thermal expansion and the three expansion coefficients. The course covers the kinetic theory of ideal gases which provides a microscopic interpretation of gas behaviour and gas molecules' motion equation. We explain essential ideal gas laws the equation of state the gas constant the Boltzmann constant and their relationships with each other.This physical science course covers real gases and their deviations from ideal gas behaviour at high pressures and low temperatures. We provide a comprehensive understanding of the Van der Waals equation before examining the first law of thermodynamics which emphasises energy conservation in isolated systems. We explore the concepts of internal energy heat transfer work and enthalpy. Mastering the first law equips you with valuable knowledge you can use to analyse energy conservation in closed and open systems.This course provides you with a solid grasp of thermodynamics thus enabling you to analyse and understand various phenomena related to temperature gases and energy conservation. Whether you are a student a scientist or simply someone with a keen interest in thermodynamics and the physical world this course expands your knowledge and provides practical applications. Sign up for this physics course to learn more about the physical world around you.