Why is water not used in place of mercury?

Why is water not used in place of mercury?

Water cannot be used in thermometer because of its higher freezing point and lower boiling point than other liquids . This range is very small as compared to other liquids as mercury , having freezing point about −39oC and boiling point 356oC .

Why we Cannot use mercury?

Heat does not flow from the body whose measurement we are taking with the thermometer. C.) At low temperatures mercury becomes transparent and it becomes difficult to take the readings.

Why is water never used as a thermometric liquid?

Water is not used as a thermometric liquid because It has a low coefficient of expansion so it is less sensitive to temperature changes.

Why do we use mercury in the clinical thermometers can water be used instead of mercury Support your answer with suitable reasons?

Mercury is the only one in liquid state at room temperature. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.

Which of the thermometer do not have mercury?

Spirit thermometers use a non-toxic alcohol instead of mercury to register the temperature. Like liquid mercury, the alcohol expands in volume as it gets warmer, causing the liquid to move up the thin tube inside the glass thermometer. Digital thermometers contain a device called a thermoresistor.

Can water be used instead of mercury?

Water is not able to be used as a thermometer liquid because of its higher freezing point and lower boiling point than the other liquids in general. This range is very negligible as compared to other liquids like mercury which has a freezing point of about −39∘C and boiling point 356∘C.

Why is water not used instead of mercury in thermometer?

Why is water not used instead of mercury in thermometer? Water cannot be used in thermometer because of its higher freezing point and lower boiling point than other liquids . This range is very small as compared to other liquids as mercury , having freezing point about −39oC and boiling point 356oC .

What are the advantages of using mercury instead of water?

Secondly, mercury does not wet glass, this means that the amount of mercury in the liquid column doesn’t change as some coats the tube. Thirdly it is opaque this makes it much easier to see than water/alcohol. Fourthly it is dense, this makes it easy to shake down to the bottom if the liquid phase gets disrupted.

What is the difference between H2O and Mercury?

Mercury is much denser than water, hence it can accomodate atmospheric pressure easily as compared to water. It isn,t as subject to such extreme phase variation compared to H2O in the range of atmospheric conditions being analysed and measured.

Why is the fluid in a barometer Mercury rather than water?

Why is the fluid in a barometer mercury rather than water or another liquid? Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure.