Formulas are generally represented by symbols, and symbols always have specific meanings. When copying a formula, you should also write down the physical quantities indicated by the symbols.
The calculation of entropy depends on the occasion and for whom:
If the temperature of an object ranges from T 1 (exothermic) to T2, ω = t2/t1;
If the temperature of two objects ranges from T 1, T2 to TM, ω = TM/√ (T 1 * T2).
Entropy refers to the degree of chaos of a system, which has important applications in cybernetics, probability theory, number theory, astrophysics, life science and other fields, and has more specific definitions in different disciplines.
The definition of thermodynamic entropy in physics is: δS =∫dQ/T (the lower limit of integration is the initial state of the system and the upper limit is the final state of the system). This definition is a relative definition of entropy, that is, it defines the change of entropy Δ s (instead of entropy itself, there is no definition of absolute entropy, but there is the concept of absolute entropy). Or dS=dQ/T, where dQ is the heat absorption of the system when the external (heat source) temperature is t and t is the external (heat source) temperature. Because it is a reversible process, the temperature of the system is also t.
The definition of entropy is abstract and has no further physical significance. In statistical physics, thermodynamic entropy is interpreted as the disorder degree of system fretting.
For example, after class, many students are randomly distributed on the playground, all of which are spontaneous and disorderly, and their positions are also random and disorderly. After school, everyone left the school gate, but it didn't open (it broke down today), so all the students piled up at the school gate and there were no students on the playground (everyone wanted to go home early). This state cannot occur in nature unless work is done on it. Air molecules are evenly distributed indoors, so we can breathe (disorderly and random); Suddenly, all the air molecules in the room gathered in a corner, and people stood in the middle of the room and suffocated, because there was no air (all the air molecules stayed in a corner), so this kind of thing would not happen. The basic course of "Thermodynamics" in universities is also called "Thermodynamics and Statistical Physics". You can also think it has something to do with mathematical statistics.
The last example is entropy. The ambient temperature is 20 degrees Celsius, the white water temperature is 20 degrees Celsius, and the blue pen water is 20 degrees Celsius. Then drop a drop of blue pen water into the white water beaker, and you will see the blue pen water slowly spread out. Finally, the white water in the beaker will turn blue and even. Entropy-is a quantity indicating the degree of this division. You can think of blue pen water as energy. After the energy is injected into the system, the energy develops in the direction of equal division, and the entropy increases at this time. If we record the whole process and put it backwards, we can see that the blue color is gathering and finally becomes a drop, indicating that the entropy is decreasing-this will not happen. Whether it is played directly or backwards, it is assumed that the whole process has 60 seconds, and every 10 second is a stage. We have six states, and entropy is the quantity that describes these six states in digital form.