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Latent Heat of Vapourisation and Fusion

The cooling c...

Question

The cooling curve below suggests that the melting point of naphthalene is?

A

353

K

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B

80

K

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C

40

K

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D

373

K

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Solution

The correct option is A $353$ K
Since the temperature does not decrease at $50^{\circ} C$ that is the material absorbs heat without change in temperature, i.e., latent heat of fusion. So it melts at 353 K.

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