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Question
While measuring the temperature of a pot of water while heating, the markings on the laboratory thermometer were erased. After a certain time of heating, the mercury level is observed to be constant. What could have been the reading on the thermometer?
While measuring the temperature of a pot of water while heating, the markings on the laboratory thermometer were erased. After a certain time of heating, the mercury level is observed to be constant. What could have been the reading on the thermometer?
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Solution
The correct option is C 100 °C
The given thermometer being a laboratory thermometer measures temperatures in the range of −10 °C to 110 °C.
When water is heated at room temperature, it acquires heat from the heat source and experiences a rise in its temperature. This continues until it reaches a particular point where the mercury level of thermometer remains constant and water begins boiling, This point is called the boiling point of water which is measured at 100 °C.
As the readings in this thermometer are erased, with the constant level of mercury, we can conclude it is at
100 °C.
The given thermometer being a laboratory thermometer measures temperatures in the range of −10 °C to 110 °C.
When water is heated at room temperature, it acquires heat from the heat source and experiences a rise in its temperature. This continues until it reaches a particular point where the mercury level of thermometer remains constant and water begins boiling, This point is called the boiling point of water which is measured at 100 °C.
As the readings in this thermometer are erased, with the constant level of mercury, we can conclude it is at
100 °C.