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

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
Ice at the base contains impurities which lowers its melting point

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Chemical Engineering Thermodynamics
Claussius-Clayperon equation gives accurate result, when the

Vapour pressure is relatively low and the temperature does not vary over wide limits
All of these
Volume in the liquid state is negligible compared with that in the vapour state
Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

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