Ideal Gas Law

The ideal gas law is the equation of state of a hypothetical ideal gas (in which there is no molecule to molecule interaction).

An isothermal process is a change of a system in which the temperature remains constant: ΔT = 0.

Isobaric processis a thermodynamic process in which the pressure stays constant (at constant pressure, work done by a gas is $P \Delta V$).

With the ideal gas law we can figure pressure, volume or temperature, and the number of moles of gases under ideal thermodynamic conditions.

The number of molecules in a mole is called Avogadro's number (N_A)—defined as 6.02x 10²³ mol^-1.

Absolute temperature is the most commoly used thermodyanmic temperature unit and is the standard unit of temperature.