Enthalpy and entropy are two thermodynamic properties related to the amount of energy a system contains. Enthalpy is a measure of the total energy content of a system, including the energy that is available for doing work. Entropy is a measurement of a system's total energy content. These two terms are related since an increase in entropy typically results in a decrease in enthalpy. In this section, we will look at the main differences between enthalpy and entropy in a systematic way. You can check the detailed information on enthalpy vs entropy here in this article.
Enthalpy Vs Entropy | Difference between enthalpy and entropy
- Enthalpy is an energy whereas entropy is an attribute.
- Enthalpy is directly related to the internal energy of the system. Entropy is a measurement of molecular randomness.
- The total sum of energies inside the system is called enthalpy. As the temperature rises, entropy increases.
- Enthalpy is denoted as H while entropy is denoted as S.
- The unit of enthalpy is KJ/mol. The unit for entropy is J/K.
- Enthalpy was termed by a scientist named Heike Kamerlingh Onnes. Entropy was termed by a scientist named Rudolf Clausius.
- Enthalpy is positive for endothermic processes and entropy is positive for spontaneous processes.
- Enthalpy is negative for exothermic processes and entropy is negative for non-spontaneous processes.
- The system favours minimum enthalpy whereas the system favours maximum entropy.
- The first law of thermodynamics is related to enthalpy. The second law of thermodynamics is related to entropy.
- Enthalpy is applicable to related standard conditions. Entropy does not have any limits or conditions.
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