Chemistry

Chapter 10 Water: essential to life Q1. recognise whatever matter-of-fact shipway in which you and your family crowd out inhibit pee supply consumption. A1. Answers could acknowledge technological solutions, such as installing a pee-saving lavish head, dual-flush toilet and peeing-efficient washing gondola or dishwasher, and planting drought-tolerant plants in the garden. Also, changing the way we spend 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 utilize 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 railway car manufacture. Farming activities use oversized volumes of water for irrigation. Q3. Water is regarded as a unique liquid. aList the physical propertie s that make water unique. b manoeuvre the significance of polarity and hydrogen puzzleing in kinship to these properties of water. A3.

aProperties that are special to water include: noble stewing temperature for its molecular size decrease in density on freezing high heat capacity high possible 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 embody between water molecules. Hydrogen bonds are stronger than other intermolecular bonds (although still weaker than the covalent intramolecular bonds) and so require much energy to break. Thus, water has a relatively high boiling temperature a! nd heat of vaporisation. Q4. aDescribe the forces that must be overcome in exhibition to melt wish-wash. bSketch, or describe, a portion of a wicket door of ice. c Explain why ice is less lowering 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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