Question

what is the importance of anomalous behaviour of water by using hopes apparatus

Answer 1

There are five steps to study the anomalous behavior of water by using Hope's apparatus. They are,

• A beaker filled with water is cooled along with the Hope's device an hour before conducting the experiment.
• A cooling mixture is prepared using crushed ice and kitchen salt.
• The Hope's device is isolated and two thermometers are inserted into the two holes of the apparatus respectively.
• Pre-cooled water is filled in the inner cylinder and the outer cylinder is filled with the cooling mixture.
• The temperatures are observed using the thermometers.

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Answer 2

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➠➠This apparatus is used to determine the temperature at which water has the maximum density. Thick sheet metal construction with baked hammertone finish.

➠➠Hope's apparatus consists of a vertical vessel full of water surrounded round the middle by a trough of cooling ice. Two thermometers, one above and one below the trough, measure the temperature of the water. It is designed to demonstrate that water reaches its maximum density at 4 °C (39 °F).

➠➠As the water in the central part of the vessel cools towards 4 °C (39 °F) (and thus becomes denser) it sinks to the bottom of the vessel, displacing the warmer water. The lower thermometer will then read a constant 4 °C (39 °F). Further cooling towards 0 °C (32 °F) will cause the now less dense water to rise to the top of the vessel, where the upper thermometer will then read a constant 0 °C

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