What are the uses of alcohol thermometer?
Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.
Why alcohol and mercury are used in thermometers?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. 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.
Where are mercury thermometers used?
Although mercury thermometers have been mostly phased out of daily home use, the tool, which was invented in the 1700s by Gabriel Daniel Fahrenheit, remains a standard measuring device for many industries, including regulating the temperature of a chemical concoction being made in an industrial lab, and monitoring the …
What is the advantages of alcohol thermometer?
A thermometer comparison
| advantages | disadvantages |
|---|---|
| Alcohol thermometer (compared to a mercury thermometer) | |
| lower freezing point (-114 �C) | less durable (alcohol evaporates) |
| larger coefficient of expansion | alcohol can polymerise |
| less hazardous | fluid loss by evaporation hard to avoid |
Why do we use mercury in thermometer can water be used instead of mercury?
We use mercury in thermometers because most metals are good conductor of heat and mercury is the only metal in liquid state. No,we cannot use water instead of mercury because water do not expand as per temperature given to it and can give us wrong reading.
What are 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.
Why alcohol is used in laboratory thermometer?
Alcohol is used in a laboratory thermometer instead of a clinical thermometer because alcohol has a very low freezing point in comparison to the Mercury. It is used in a cool place or region. The freezing point is the temperature at which a liquid starts changing into solid-state.
What are uses of thermometer?
A thermometer is a tool that measures temperature — how hot or cold something is. Thermometers are used to see if you have a fever or tell you how cold it is outside. Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward.
What are the advantages of mercury thermometer?
Advantages
- It is a good conductor of heat and hence, can measure even high temperatures.
- It gives results quickly – has a fast response time.
- It expands linearly and less than alcohol and any other liquid.
- It is more durable than alcohol thermometer because mercury does not evaporate easily.
What is the difference between mercury and alcohol thermometer?
Main Difference – Alcohol vs Mercury Thermometers A thermometer is a device that is used to measure the temperature. The main difference between alcohol and mercury thermometer is that the bulb of mercury thermometer is filled with mercury whereas the bulb of alcohol thermometer is filled with an alcohol.
What are the advantages of alcohol over mercury?
Advantages of using alcohol over mercury as thermometric liquid are: i) Alcohol has greater value of temperature coefficient of expansion than mercury. ii) it’s freezing point is below –100°C. Thus, alcohol thermometer is more sensitive than mercury thermometer and can be used to measure the temperature below –40°C.