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प्रश्न
The melting point of napthalene is 80°C and the room temperature is 25°. A sample of liquid napthalene at 90° is cooled down to room temperature. Draw a temperature-time graph to represent this cooling. On the graph mark the region which corresponds to the freezing process.
आकृती
उत्तर
The cooling curve for naphthene can be seen in the image below.
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Melting and Freezing
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