Adiabatic heating occurs when an air parcel descends and is compressed by the increasing atmospheric pressure at lower altitudes. In this process, the air warms up without any heat being added from the outside. Instead, the work done on the air parcel by compression is converted into internal thermal energy, raising its temperature. ANSWER: (C) Heating of air due to compression as it sinks
What is ‘Adiabatic’ heating? (A) Heating through solar radiation (B) Heating through the addition of fuel (C) Heating of air due to compression as it sinks (D) Heating through contact with the warm ground
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The term “adiabatic” refers to a process where no heat is exchanged with the surrounding environment. When air sinks (subsides), the weight of the atmosphere above it increases, squeezing the air molecules together. This compression forces the molecules to move faster, which we detect as a rise in temperature. This is the opposite of adiabatic cooling, which happens when air rises and expands. Adiabatic heating is the reason why air descending the leeward side of a mountain range (like the Chinook or Foehn winds) becomes very warm and dry.
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