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Alcohol is non-toxic, economically more viable and can be easily dyed to make it more visible in the capillary tube when it undergoes thermal expansion or contraction, hence it is used in laboratory thermometers. The alcohol used is not absolute ethanol however (ethanol has a boiling point of 78 degrees Celsius, while laboratory thermometers can measure up to 110 degrees Celsius); larger chain alcohols (e.g. isopropyl alcohol) would suggestibly be preferable in this context.
This is, however, an obsolete approach to measuring temperature - today, more accurate quantification of temperature may be achieved through temperature sensitive probes with digital readouts.
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Why is mercury used in clinical thermometer and not laboratory thermometer?
Mercury is no longer used much in thermometers due to the poisonous compounds that it forms. When I grew up, in Chemistry at school and at the doctors there were mercury thermometers and alcohol thermometers.
What is the temperature used on laboratory thermometers?
the temperature measured on the laboratory thermometer is from-10degree Celsius to 110 degree Celsius
What are the two most commonly found in liquid-in-glass thermometers?
if you mean what are the two most commonly found liquids in a liquid-and-glass thermometer then the answer is mercury and alcohol :) hope this helps
Why 70 percent alcohol used in laboratory?
If WE Use 90% alcohol it will get evaporated, for 30% alcohol no reaction occurs as water content will be high . so, 70% is used
Why does the doctor dip the thermometer in a liquid before use?
it is alcohol to disinfect the thermometer
Is alcohol used for clinical thermometers or laboratory thermometers?
Alcohole is not used for any thermometer only murcury (Hg) is used
Define a laboratory thermometer in 2 sentences.?
A laboratory thermometer is a device for measuring temperature ranges. It can take the form of a manual (mercury or alcohol) or electronic (digtal).
What is a laboratory thermometer?
A laboratory thermometer is used to check the temperature, or changes in temperature, of an object with precise accuracy.
Difference between laboratory and clinical thermometer?
A clinical thermometer is used to measure a human body, and the laboratory thermometer is used to boil water and other lab uses.
Why is mercury used in clinical thermometer and not laboratory thermometer?
Mercury is no longer used much in thermometers due to the poisonous compounds that it forms. When I grew up, in Chemistry at school and at the doctors there were mercury thermometers and alcohol thermometers.
What is the used laboratory thermometer?
Measuring the temperature.
What is the laboratory thermometer used for?
Measuring the temperature.
What is the function of thermometer in laboratory?
A thermometer is used for measuring accurate temperatures. Also using the degrees Fahrenheit and Celsius.
What liquids are used in thermometer?
Mercury and alcohol
What is in the laboratory thermometer?
There are many kinds of thermometer in use. Liquid in glass thermometers usually contain alcohol (dyed red or blue) or mercury (silvery coloured).
How do you read a laboratory thermometer?
you look at the sticks on the sidething
Can alcohol be used in a thermometer?
Yes, it can and you can purchase thermometers which use alcohol.
