Entropy change for isothermal heat transfer calculator

Entropy change for an isothermal heat transfer process refers to the change in entropy that occurs when heat is transferred between two systems at constant temperature. In such a process, the temperature of the systems involved remains constant throughout the transfer.

The entropy change ($\Delta S$) for an isothermal process is given by the ratio of the heat transferred ($Q$) to the temperature ($T$) at which the transfer occurs. Mathematically, it can be expressed as:

Where:

• $\Delta S$ is the change in entropy (in Joules per Kelvin, J/K)
• $Q$ is the heat transferred (in Joules, J)
• $T$ is the temperature (in Kelvin, K)

Entropy is a measure of the disorder or randomness in a system, and the second law of thermodynamics states that the entropy of an isolated system tends to increase over time. In the case of an isothermal process, where temperature remains constant, any heat transfer results in an increase in entropy, reflecting the tendency of the system to move towards a state of greater disorder.