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Entropy of a perfect crystal at absolute zero (0 K) is zero

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the entropy of the universe (the ultimate isolated system)  increases spontaneously  never decreasing.

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Energy is not created nor destroyed, it is only transferred  or changed from one form to another

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State function relating entropy and enthalpy to determine spontaneity or energy available to do work.

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A process that is spontaneous in one direction under a particular set of conditions is nonspontaneous in the reverse direction.

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is one that  not take place unless it is “driven” by the continual input of energy from an external source.

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is one that occurs naturally under certain conditions.

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Is a measure of the heat content of a chemical or physical system.

Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy.

Exothermic processes release energy upon completion, and are signified by a negative change in enthalpy.

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Is a measure of disorder within a system, and  how the energy becomes more spread out in a process.

The entropy for any substance increases with temperature

The state function that is a measure of the matter and/or energy dispersal

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The region in space in the neighborhood or boundary of the system. It comprises the rest of the universe apart from the system.

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It is any region of space that is under thermodynamic investigation.

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The system and its environment cannot be restored to their original states at the same time.

In reality, almost all processes are irreversible, and some properties of the environment are altered when restored.

No equilibrium in the system

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the system and environment can be restored to exactly the same initial states that they were in before the process occurred.

Equilibrium between initial and final states of the system

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are "functions" that define the state of a system. Which take into account  initial and final state to calculate the variable for the change,  and are totally independent of the path taken between them.

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is the quantity of energy transferred from one system to another