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Using a graph discuss the change of state when ice is heated from -2⁰C until it boils.

Using a graph discuss the change of state when ice is heated from -2⁰C until it boils.

Answers

When ice is heated say from -2⁰C until it boils, it undergoes changes which can be represented by the heating curve below:

Between the points AB, ice absorbs heat energy and its temperature rises. Between BC, the ice absorbs its latent heat of fusion which it uses to melt. This change of state occurs at a constant temperature. Between CD water absorbs heat energy as its temperature rises until boiling point. As the water boils at constant temperature, it absorbs its latent heat of vaporization.
When the vapour condenses to liquid, it gives out its latent heat of vaporization. Similarly, when a liquid freezes to solid, it gives out its latent heat of fusion.

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sharon kalunda answered the question on April 24, 2019 at 09:47

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