Chemical Engineering Thermodynamics
A large iceberg melts at the base, but not at the top, because of the reason that

Ice at the base contains impurities which lowers its melting point
Due to the high pressure at the base, its melting point reduces
All of these
The iceberg remains in a warmer condition at the base

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Chemical Engineering Thermodynamics
Free energy

Change during a spontaneous process has a negative value
All of these
Remains unchanged in reversible processes carried at constant temperature and pressure
Decreases in all spontaneous (or irreversible) processes

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