# What do the first two laws of thermodynamics state?

Mar 22, 2018

Law 1: Energy (in this case, heat) is neither created nor destroyed in any thermodynamic system. Law 2: The total amount of disorder (also known as entropy) of a system, and its surroundings will never decrease.

#### Explanation:

Thermodynamics is the study of energy transfers, which involve work and heat. This includes the resulting changes in thermal energy, temperature, volume, and pressure.

The First Law of Thermodynamics (cons. of energy w/ heat) :
Energy (in this case, heat) is neither created nor destroyed in any thermodynamic system
. This can be expressed in the equation ΔV = Q - W, where ΔV is the change in internal energy of the system, $Q$ is the heat added to the system, and $W$ is the work done by the system. Note that $V$ depends on the state of the system

The Second Law of Thermodynamics: The total amount of disorder (also known as entropy) of a system, and its surroundings will never decrease. This law also relates to ideas such as heat always flowing from a higher temperature to a lower temperature and never the opposite, heat engines never being able to operate at 100% efficiency, or it being impossible to convert heat completely into work".

Hopes this helps!