Experiment to investigate the relationship between volume and pressure at constant temperature

Law of Boyle-Mariotte for ideal gases

The law of Boyle-Mariotte describes the relationship between a decrease in volume and the resulting increase in pressure at constant temperature (isothermal process). Learn more about it in this article. Isothermal process If...
Increasing the air temperature by doing work on the gas while inflating a bicycle tire with an air pump

Internal energy of ideal gases

In ideal gases, the change in internal energy is directly related to the change in temperature. Learn more about the relationships in this article. Simplified assumptions for ideal gases In thermodynamics, gases play...
Operating principle of a heat pump (conversion of work into heat)

The process quantities: Heat and work

Work and heat are process quantities that describe the process of a supply of energy ("energy in transit")! Learn more about it in this article. Work and heat transferred to a substance Energy...
Turbofan engine of an airplane

Thermodynamic systems

A thermodynamic system is a confined space of matter (e.g. gas) within which thermodynamic processes take place. The system boundary separates the system from the environment. Learn more about it in...
Cylinder with a movable piston

Ideal gas law (explained and derived)

The ideal gas law describes the relationship between pressure, volume, mass and temperature of ideal gases. Learn more about it in this article. Parameters influencing the gas pressure The figure below shows a...