The effect of temperature on absolute humidity 1 This is the reason for temperature compensation in anaesthetic vaporisers. If heat is not added to the system the energy is obtained from within the liquid and it cools. The amount of heat energy required to turn 1g of substance from liquid to vapour at a given temperature is the latent heat of vaporisation 1. This in turn raises the saturated vapour pressure. If heat energy is added to the system the kinetic energy of the molecules increases, therefore the amount of substance escaping the liquid state increases. At equilibrium this is known as the saturated vapour pressure 1. The vapour above the liquid will saturate the gas and exert a partial pressure. If the liquid is left within a sealed container equilibrium is reached between molecules leaving and re-entering the liquid. The molecules which escape are the ones with the highest kinetic energy, therefore the average kinetic energy of the remaining liquid and therefore its temperature falls 1. At the surface of a liquid some molecules can escape the intermolecular forces keeping them in liquid form and evaporate to form a vapour. In the liquid phase molecules move randomly and have a variable kinetic energy.
Substances exist as solids, liquids or gases.
Failure to humidify gases can cause patient complications.Multiple devices are available to measure the humidity of gases.Humidity describes the amount of water vapour within a gas.
0 kommentar(er)
