User:SACAlexanderTang

Thermodynamics is a branch of physics that studies the movement of heat between different objects. Thermodynamics also studies the effects of pressure and volume of objects as temperature changes. It is normally studied by using a branch of mathematics called statistics to look at the motion of particles. Thermodynamics is made of 2 main branches called classical thermodynamics and statistical thermodynamics. An important idea in thermodynamics is the systems. A system is an object or a group of objects that is being studied.

In thermodynamics, there are 4 laws of thermodynamics that say that energy can be moved between two objects in the form of heat.

• Zeroth law of thermodynamics

If two systems have equal heat and, at the same time, one of the two systems has equal heat with another system, all three systems have equal heat.

• First law of thermodynamics

An increase in energy in a system is the same as the energy given to a system in the form of heat.

• Second law of thermodynamics

The temperature of systems that touch each other will become equal.

• Third law of thermodynamics

When a system has a temperature of absolute zero (lowest temperature), the entropy (energy that cannot be used to do work) is at 0.

In the past, thermodynamics was studied to make steam engines work better. Now, ideas from thermodynamics are used in everything from making engines to studying black holes.