Difference Between Heat And Thermodynamics

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Thermodynamics is the study of heat and chemical transformations as a result of energy changes, energy is what keeps things moving in our everyday life and is applied to nearly everything to a point where knowledge of thermodynamics is common sense weather we know it or not. Now a days every household, car, office and even laptops and electronics have air conditioning which has allowed for appealing aspects of commercial use and consumer consumption, but what we don 't consider is how it uses heat, and the absence of heat to facilitate the exothermic and endothermic reactions to do work. Air conditioning controls humidity, ventilation and temperature, creating a fresh ambiance in warmer weather. It requires scientific topics which
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In the first step in which an air conditioner works, the air temperature from the household is absorbed by the refrigerant in the evaporator which contains a liquid and becomes vapour. This occurs as the liquid is hydrochlorofluorocarbons (organic) which can be easily converted from a cold liquid to a hotter gas. This is an endothermic reaction as the system absorbs heat and leaves the surroundings (air) cooler as a result of change in kinetic energy, and therefore a phase change. In an equation format this can be represented as ∆H=n∆Hvaporization leaving a positive enthalpy and a negative heat energy (-q). In the next stage the gas goes through a compressor and quickly afterwards into the condenser, here the reverse reaction occurs and the gas is condensed and returned to liquid form. This is the an exothermic reaction as the system losses heat and is absorbed by the surroundings. The heat that is given off is a negative enthalpy change (-∆H) and a positive heat energy (q) this equation is ∆H= -n∆Hvaporization. The heat released its not wanted and so fans and ventilators in the air conditioner dissipate the heat outside, in order for the cool air to remain “fresh”. Both these reactions emulate the first law of thermodynamics “Law of conservation”, which states; energy may be converted from one …show more content…
Beginning with the evaporator, the air in the surroundings are absorbed by the liquid. This liquid is an organic compound that is easily changed from liquid to a gaseous state, allowing of the absorption of heat. Here, in the evaporator the air conditioner can also remove humidity from the air. In the coil of the evaporator the humidity is removed and is later leached and collected in a separate part of the air conditioner leaving the air cooler and drier as it leaves the evaporator. In a gaseous state it moves in to the compressor, which indicated by the name compresses the gas to a higher pressure and in tune a higher temperature, and is then transported on to the condenser. In this third stage, the gas must be converted back to a liquid in order of the reaction to occur again and again and keep the air conditioner working, by allowing the gas to cool down it returns to its liquid state. Finally, in the expansion device the movement of the liquid is controlled and brought back to the evaporator. This cycle allows for the air in a room, car, office or electronic device, to be cooled down and create a more desirable place of work in order to do work. One may also see this resemblance of an air conditioner and a fridge, these two operations work almost identical with the difference being the temperature as one is brought to a lower temperature in order

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