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11 June, 14:58

Water at the Antarctica usually exits as ice, making it very difficult to use the water or conduct experiment requiring the water to be in liquid state. A coffee addicted physicist stationed at a research base requires about 0.8 kg of ice for his coffee on the hour. a. How much heat is required to convert 0.8 kg of ice at - 35 "C into steam at 100 C7 b. Plot the temperature - energy graph for the processes in (a). 5] [5] c. The surface tension of water was determined in a laboratory by using the drop weight method. 100 drops were released from a burette the inner diameter of whose opening is 1.8 mm. The mass of the droplets was 3.78 g. 1. Determine the surface tension of the water and comparing it with the tabulated value, i. Calculate the relative error of the measurements: [6] [4]

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  1. 11 June, 15:36
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    water or conduct experiment requiring the water to be in liquid state. A coffee

    addicted physicist stationed at a research base requires about 0.8 kg of ice for

    his coffee on the hour.

    a. How much heat is required to convert 0.8 kg of ice at - 35 °C into steam

    at 100°C?

    [5]

    b. Plot the temperature - energy graph for the processes in (a). [5]

    C. The surface tension of water was determined in a laboratory by using

    the drop weight method. 100 drops were released from a burette the

    inner diameter of whose opening is 1.8 mm. The mass of the droplets

    was 3.78 g.

    i. Determine the surface tension of the water and, comparing it

    with the tabulated value,

    161

    ii. Calculate the relative error of the measurements.
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