Chemistry

Chapter 10 Water: essential to life Q1. account virtually matter-of-fact shipway in which you and your family crowd out put down pee supply consumption. A1. Answers could acknowledge technological solutions, such as installing a pee-saving lavish head, dual-flush toilet and peeing-efficient washing forge or dishwasher, and planting drought-tolerant plants in the garden. Also, changing the way we part water, such as taking shorter showers, only using the machines with a beat load and water the garden little frequently. Q2. Describe some of the important ways in which water is apply in industry. A2. Water can be used as a coolant in cypher production, such as in power plants. It is used to mangle wastes or as a cleaning agent in industries ranging from food production to political machine manufacture. Farming activities use oversized volumes of water for irrigation. Q3. Water is regarded as a unique liquid. aList the physical propert ies that make water unique. b manoeuvre the significance of polarity and hydrogen puzzleing in comparison to these properties of water. A3.

aProperties that are special to water include: noble simmering temperature for its molecular(a) size decrease in density on freezing high heat capacity high potential heat of confederation and evaporation for a substance of its molecular size bThe bond between H and O atoms in water is highly polar. As a result, hydrogen bonds hold out between water molecules. Hydrogen bonds are stronger than other intermolecular bonds (although still weaker than the covalent intramolecular bonds) and so require to a greater extent ene rgy to break. Thus, water has a relatively h! igh boil temperature and heat of vaporisation. Q4. aDescribe the forces that must be overcome in army to melt ice-skating rink. bSketch, or describe, a portion of a wicket of ice. c Explain why ice is less ambiguous than liquid water. A4. aThe hydrogen bonds that hold water molecules in an ice lattice must be break if ice is to melt. b [pic] cAs...If you want to get a full essay, order it on our website: OrderEssay.net

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