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Question

The amount of usable energy available for doing work when the temperature and pressure are uniform throughout the system is called


A

Spontaneous energy

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B

Free energy

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C

Entropy

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D

Activation energy

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E

Enthalpy

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Solution

The correct option is D

Activation energy


Activation energy is the amount of energy required by a system to start a reaction at a constant temperature and pressure.

Enthalpy is the total heat content of a system.

Entropy is the amount of available energy which can be converted for doing mechanical work.

Free energy is the amount of available internal energy to perform work.


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