Which property that must decrease when a gas condenses into a liquid?

Standard voltaic potential

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Entropy

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Enthalpy

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Reaction rate

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Gibbs free energy

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Solution

The correct option is A Entropy
Entropy must decrease when a gas condenses into a liquid.
The entropy of a gas is higher than the entropy of liquid as gas molecules are free to move and the liquid molecules are held by strong intermolecular attractive forces.

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