A real gas is a gas that does not behave according to the assumptions of the kinetic-molecular theory. In summary, a real gas deviates most from an ideal gas at low temperatures and high pressures. Gases are most ideal at high temperature and low pressure.

Breathing involves the movement of the diaphragm and the rib cage. During inhalation, ribs move up and outwards and diaphragm moves down. This movement increases space in our chest cavity and air rushes into the lungs. The lungs get filled with air.

Exhalation takes longer than inhalation and it is believed to facilitate better exchange of gases. Parts of the nervous system help to regulate respiration in humans. The exhaled air isn’t just carbon dioxide; it contains a mixture of other gases.

So we could say that Charles’ Law describes how hot air balloons get light enough to lift off, and why a temperature inversion prevents convection currents in the atmosphere, and how a sample of gas can work as an absolute thermometer.

Air will continue leaving the lungs until the lung pressure equilibrates with the room pressure. Charles’s law describes how gasses expand as their temperature increases. A gas’s volume (V1) at its initial temperature (T1) will increase (to V2) as its temperature increase (to T2).

Although in fact gases won’t have zero volume at absolute zero (they’ll be solids, and solids have volume), modern theory does still consider absolute zero special. In fact, we have to use temperature in Kelvin for any gas law problem. A diagram showing how volume increases as temperature increases.

During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles (the muscles that are connected to the rib cage), thus expanding the thoracic cavity. Due to this increase in volume, the pressure is decreased, based on the principles of Boyle’s Law.

When you breathe out, or exhale, your diaphragm relaxes and moves up into your chest cavity. As the space in your chest cavity gets smaller, air rich in carbon dioxide is forced out of your lungs and windpipe, and then out your nose or mouth.

What might happen if you punctured your chest cavity? Your lungs could not take in more air without it leaking out; you could not breathe in and out. Technical Explanation: The pressure would be the same inside and outside the lungs — air and waste products would not be forced in and out of the lungs.