Interconversion of states of matter can be brought about by either change of temperature or pressure or both. During interconversion of states of matter temperature remains constant although heat is continuously supplied or withdrawn. Heat supplied or withdrawn is used to bring about the change of state of matter. (a) Why does the temperature of a substance remain constant during melting process? (b) Why steam at 100°c is better for heating purposes than water at 100°c? (c) It is a hot Summer Day. Aneek and Madhu are wearing cotton and nylon clothes respectively. Who do you think would be mare comfortable and why? (d) Which gas is called as dry ice?
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The phenomenon of the change of matter from one state to another and back to original state is known as interconversion of the sates of matter. Matter can be changed from one state to another by changing temperature or pressure. When heat energy is supplied to ice it changes into water and then to vapor.
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