definitions of entropy

Like pressure, volume, temperature and internal energy, we have another thermodynamic variable of a system, named entropy . In a given state of equilibrium, the system has a definite value of entropy. If the system has a temperature T (in absolute scale) and a small am..

Entropy - The extent of disorder or randomness in a system may be expressed by a property known as entropy. Entropy may be termed as the property of a system which measures the degree of disorder or randomness in the system. It is generally expressed by the symbol, S. ..

The extent of disorder or randomness in a system may be expressed by a property known as entropy. Entropy may be termed as the property of a system which measures the degree of disorder or randomness in the system. It is generally expressed by the symbol, S. Entropy li..

The important characteristics of entropy are summed up below: 1) Entropy is an extensive property. Its value depends upon the amount of the substance present in the system. 2) Entropy of a system is a state function. It depends upon the state variables (T, P, V, n). T..

During a spontaneous process, the entropy of the system goes on increasing. When the system reaches the equilibrium state, the entropy of the system becomes maximum and therefore, no more increase in the entropy of the system is possible. Thus, the condition for any s..

The third law of thermodynamics deals with the entropies of the perfect crystalline substances at absolute zero of temperature. According to third law of thermodynamics: At absolute zero the entropy of a perfectly crystalline substance is taken as zero. This law was first formul..

The third law helps to calculate the absolute entropies of pure substances at different temperatures. The entropy (S) of the substance at different temperature T may be calculated by the measurement of heat capacity changes. If S o be the entropy of the substance at ..

Thermodynamic variables are the quantities like pressure, volume and temperature, which help us to study the behavior of a thermodynamic system. There are some other thermodynamic variables such as entropy, internal energy, etc., but these thermodynamic variables can be expressed in terms..

The second law of thermodynamics introduces the concept of entropy and its relation with spontaneous processes. In an isolated system such as mixing of gases, there is no exchange of energy or matter between the system and the surroundings. But due to increase in randomness, there i..