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Is not the advantage of using mercury in thermometer?
Disadvantages of Mercury: It cannot measure very low temperature, because its freezing point is high (-40ºC) Mercury is poisonous, so it harmful if its tube is broken. Its price is very high. Hence, the slightest change in temperature is notable when it’s used in a thermometer.
What is a disadvantage of a mercury thermometer?
Disadvantages. It is highly toxic for living beings and the environment if the bulb breaks and mercury leaks out. Mercury is difficult to clean, and it can contaminate the surface on which it leaked. It cannot measure cold temperatures.
What are the disadvantages of using mercury thermometer?
The disadvantages of mercury as thermometric liquid are: i) its temperature coefficient of expansion is very low and it cannot be used to measure the temperature below –39°C and above 357°C. ii) Mercury thermometer cannot be used in very cold regions like arctic regions because it freezes below a temperature of 39o C.
What are the disadvantages of mercury thermometer?
The Weaknesses or the disadvantages of Mercury:
- It cannot measure very low temperature, because its freezing point is high (-40ºC)
- Mercury is poisonous, so it harmful if its tube is broken.
- Its price is very high.
- display is harder to read.
- cannot be used for thermograph.
- slow response.
- fragile.
What are the advantages of using mercury?
Advantages of mercury are:
- It is opaque and shining.
- It does not wet the glass.
- It has a low freezing point and a high boiling point.
- It is a good conductor of hest, so it quickly absorbs heat to attain the temperature of the object.
- It has a wide range of temperature expansion.
What is the disadvantage of using mercury?
What are the advantages of mercury thermometer Class 7?
Advantages of using mercury in a thermometer
- It is opaque and shining.
- It does not wet the glass.
- It has a low freezing point and a high boiling point.
- It is a good conductor of hest, so it quickly absorbs heat to attain the temperature of the object.
- It has a wide range of temperature expansion.
What are the advantages and disadvantages of mercury?
-It expands uniformly (linear expansion) and responds quickly to temperature changes, hence is sensitive. -It has a visible meniscus. -Mercury is very poisonous. -It has a high freezing point therefore it cannot be used in places where the temperature gets very low.
What is the advantages of mercury?
Advantages of mercury as a thermometric liquid. -It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly. -It does not wet (cling to the sides of) the tube. -It expands uniformly (linear expansion) and responds quickly to temperature changes, hence is sensitive.
What does mercury do in a thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
What is mercury thermometer used for?
Best used to measure high temperatures, mercury thermometers are still widely used in meteorology and in high temperature places such as autoclaves, which are high-pressure vessels used to sterilize or process equipment.
What elements are in a thermometer?
Thermometers consist of three basic elements: spirit-filled liquid, which responds to changes in heat and cold; a glass tube to house the temperature-measuring liquid; and black ink to color in the engraved scale marks with legible numbers.