First Law of Thermodynamics

What is thermodynamics?

A relationship between heat, work, and internal energy

What is internal energy?

The sum total of all of the energy of the molecules in a system

State the first law of thermodynamics.

The change of internal energy of a closed system will be equal to the heat added/release to/by the system minus the work done to slash a buy a system.

First law of thermodynamics formula

Δu=Q-W

What is an adiabatic process?

A thermodynamic process by which no energy is transferred to or from the system as heat. No heat transfer occurs.

In which case does the system do work on the surroundings?

If the work is positive

In which case do the surroundings do work on the system?

When the work is negative