How does air conditioning alter the relative humidity of a room?

Answer 1

Air conditioners use a process called refrigeration, and take advantage of the physical principal in which converstion of air(a gas) to liquid (water), heat is absorbed. Air conditioners use this law by using metal coils filled with refrigerants (chemicals with cooling properties) and fans to blow air across the coils repeatedly, to cause evaporation and condensation of the moisture in the air. The refrigerant absorbs the heat that is produced, and high pressure within the coils is used to pump the warmed coolant and dispose of the excess heat that is produced. The system will have to run at a certain level of efficiency to be effective at cooling the interior air. Overall this process causes the interior air to become cooler, and releases water as a byproduct, therefore reducing the humidity of air in a room.