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    Practice problems - thermodynamics

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    (1)Explain why a beaker filled with water at 4 degree celsius overflows if the temperature is decreased or increased

    (2)Mercury boils at a temperature of 357 Degree Celsius. How then can mercury thermometers be used to measure temperatures up to 500 Deg Celcius ?

    (3)Two thermometers are constructed in the same way except that one has a spherical bulb and the other has a cylindrical bulb. which one will respond quickly to temperature changes ?

    © BrainMass Inc. brainmass.com December 24, 2021, 4:47 pm ad1c9bdddf
    https://brainmass.com/physics/heat-thermodynamics/temperature-change-functions-7553

    SOLUTION This solution is FREE courtesy of BrainMass!

    (1) This is due to anomalous expansion of water. The maximum density of water occurs at 4 Deg Celcius. So the water expands whether it is heated above 4 deg C or cooled below 4 deg C. Because of this increase in volume, water over-flows in either case.

    (2) The space above mercury is filled with nitrogen in a thermometr. When the mercury expands, the nitrogen is compressed, the pressure is increased, and the boiling point is raised.

    (3) The thermometer with the cylindrical bulb will respond quickly because, the area of the cylindrical surface is greater than that of the spherical bulb, and the mercury in the bulb reaches the temperature of the surrounding faster.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 4:47 pm ad1c9bdddf>
    https://brainmass.com/physics/heat-thermodynamics/temperature-change-functions-7553

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