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Interpretation: The change that occurs in the molecules when sample of ice is slowly heated until it liquefies and then vaporizes is to be stated.
Concept introduction:The energy of molecules increases as the temperature of substance increase. The phase change occurs when ice is subjected to heat.
Answer to Problem 22A
The intermolecular distance between molecules of water increases and the intermolecular forces between molecules decreases whensample of ice is slowly heated until it liquefies and then vaporizes.
Explanation of Solution
Water in the shape of ice is categorized as solid state. In solid state, molecules are present very close to each other. In ice, water molecules are strongly held together by hydrogen bonding. When ice is subjected to high temperature the molecules of water starts vibrating. The vibration of molecules breaks structure of ice. The hydrogen bond between molecules starts breaking. Slowly as the temperature increases the molecules of water becomes independent. Now they are not held by strong hydrogen bonds.At melting point the ice phase of water changes from solid to liquid.
Ice liquefies when hydrogen bond between molecules break. They start moving in random direction. As the applied heat increases temperature, the movement of molecules increases. When the temperature reaches about
The intermolecular distance between molecules of water increases and the intermolecular forces between molecules decreases whensample of ice is slowly heated until it liquefies and then vaporizes.
Chapter 10 Solutions
World of Chemistry
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