OpenStax
Open Stax: College Physics: The First Law of Thermodynamics
An online college physics textbook that explores the first law of thermodynamics by defining the processes of a simple heat engine. Section also describes the difference among isobaric, isochoric, isothermal, and adiabatic. Students will...
Texas Education Agency
Texas Gateway: The First Law of Thermodynamics and Some Simple Processes
By the end of this section, you will be able to describe the processes of a simple heat engine; explain the differences among the simple thermodynamic processes: isobaric, isochoric, isothermal, and adiabatic; and calculate total work...
University of Sydney (Australia)
Equations for Thermodynamics
An exhaustive list of equations and formulas which are commonly used in thermal physics (including equations for triple point). Equations are organized according to category. Meaning of the symbols is clearly stated.