Enthalpy vs. Entropy

[Connie2I]

What is the conceptual difference between calculating the standard enthalpy of a phase change vs. the standard entropy of a phase change?

[Vivian Nguyen]

Hello, the standard enthalpy of a phase change is the change in enthalpy required to supply the energy needed to carry out that certain phase change in a specific substance.
Meanwhile, the entropy of a phase change deals with the change in the number of states (disorder) of the substance.

[Angel Gomez 1K]

Would you mind explaining why enthalpy can be measured as an amount altogether but entropy can only be measured by the changes in it?

[Marina Georgies 1C]

Enthalpy can be measured quantitatively because of processes like calorimetry. It is essentially heat, and we use temperature to measure it directly. Entropy is the measure of how disordered a system is, so it is harder to give it a number value, however; the equation S=kblnW allows you to calculate a value for entropy. hope this helps

[Warda Sahib 2J]

Entropy is a measure of disorder or randomness of a system. Enthalpy is defined as the sum of internal energy of a system and the product of the pressure and volume of the system.