What is thermodynamics?
Thermodynamics is the area of science that includes the relationship between heat and other types of energy. Thermodynamics was discovered and studied at the beginning of the 18th century. At that time it was connected and gained importance for the use of steam engines.
Thermodynamics can be divided into four laws. Although the laws of thermodynamics are added after three other laws, Zeroth Law is usually discussed first. It states that if two systems are in thermal balance with the third system, then they are in thermal balance between themselves. In other words, if two systems are the same temperature as the third system, then all three are the same temperatures.
The first thermodynamic law states that the total energy energy remains constant, even if it is converted from one form to another. For example, kinetic energy - the energy that the object has when it moves - is converted into thermal energy when the driver presses the brake to the car to slow down. Often there are phrases that help people remember the first thermodynamistU: "Work is warm and warm is work." In principle, work and heat are equivalent.
The second law of thermodynamics is one of the most basic laws in science. It states that heat cannot flow into the system at a higher temperature from the system at a lower temperature. In order to take such an action, work must be done. If the ice cube is placed in a cup of warm water, the ice cube melts as the heat flows from the water. The final result is a cup of water that is slightly cooler. Ice cubes can only form if energy is used.
Another example of the second law that only works with the addition of energy can be seen with the older refrigerator. In this case, cooling the inside of the refrigerator heats the outside. So the work is done and the work of Makes Heat. The work is completed by the refrigerator pump.
The second law of thermodynamics also says things can wear things. For example, if the brick house is left without stay, eventually breaks down from the wind, rain, cold and other weather conditions. However, if a pile of bricks, if it remains unattended, will never create a house if there is no work added to the mix.
The third law on thermodynamics states that the change in the system entropy, when converting from one form to another, is close to zero when its temperature is close to zero on the Kelvin scale. Zero on the Kelvin scale is the absolute lower temperature limit - when atoms and molecules have the least possible energy. Entropy is defined as the availability of the energy system for work. It follows that there is an absolute scale of entropy. As a result, no real system can ever reach zero levels on the Kelvin scale.