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Why do water and alcohol cling to a glass rod while mercury does not?
Wiki User
∙ 13y ago
Cohesion is the tendency of molecules to be attracted to similar molecules. Adhesion is the tendency of molecules to be attracted to dissimilar molecules.
Water is both cohesive and adhesive, as is ethanol alcohol. The cohesiveness of water can be demonstrated by filling a cup with water and placing a wet clothe over the top of the cup, then flipping the cup upside down. The water will not entirely spill out of the cup.
Mercury is cohesive, but not adhesive, so two drops of mercury will absorb one another, but dipping a clothe in mercury will not absorb it.
The phenomenon of cohesion and adhesion can be understood by looking at the molecular structure and charge distribution of a molecule.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agotaga kiddies ka noh?
hinde ako taga kiddies cadet 1/c;borongan nga pala.
Wiki User
∙ 11y agowater wet glass bcus the force of adhesion between d glass molecules and water molecules is greater dan d force of cohesion between d water molecules and glass
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Why does alcohol cling to a glass rod while mercury does not?
Cohesion is the tendency of molecules to be attracted to similar molecules. Adhesion is the tendency of molecules to be attracted to dissimilar molecules.Water is both cohesive and adhesive, as is ethanol alcohol. The cohesiveness of water can be demonstrated by filling a cup with water and placing a wet clothe over the top of the cup, then flipping the cup upside down. The water will not entirely spill out of the cup.Mercury is cohesive, but not adhesive, so two drops of mercury will absorb one another, but dipping a clothe in mercury will not absorb it.The phenomenon of cohesion and adhesion can be understood by looking at the molecular structure and charge distribution of a molecule.
Why is mercury a more suitable liquid for thermometer than water and alcohol?
Non sticky to the glass surface Because of shining its level can be easily seen Boiling point is high Being metal, coefficient of expansion is high Above all, its angle of contact with glass is obtuse and so its meniscus is convex.
Why does a mercury-in glass thermometer first drop slightly when placed in boiling water?
When placed in boiling water, the materials comprising the thermometer respond in the order in which the heat penetrates them. As the heat first permeates the glass cylinder, the cylinder expands, enlarging the bore. For the moment until the mercury is also heated, the constant volume of mercury fills the expanded bore to a slightly lower depth. When the heat reaches the mercury and it also expands, its volume to increase, and the liquid depth rises in the bore.
What is a good homemade remedy for static cling?
You can use a little water mist to reduce static cling.
How can an ice cube float in a glass of water?
ice cube floats in water because it is dense and heavy if u compare water to alcohol then an ice cube will sink in the alcohol because alcohol is less dense which means its light.
Why does alcohol cling to a glass rod while mercury does not?
Cohesion is the tendency of molecules to be attracted to similar molecules. Adhesion is the tendency of molecules to be attracted to dissimilar molecules.Water is both cohesive and adhesive, as is ethanol alcohol. The cohesiveness of water can be demonstrated by filling a cup with water and placing a wet clothe over the top of the cup, then flipping the cup upside down. The water will not entirely spill out of the cup.Mercury is cohesive, but not adhesive, so two drops of mercury will absorb one another, but dipping a clothe in mercury will not absorb it.The phenomenon of cohesion and adhesion can be understood by looking at the molecular structure and charge distribution of a molecule.
Are alcohol thermometers better than mercury thermometers?
They both have advantages and disadvantages: A mercury-in-glass thermometer can measure high temperature (up to 357 0C, the boiling point of mercury; and its freezing point is -39 0C). An alcohol-in-glass thermometer can measure low temperature (down to -115 0C, the freezing point of alcohol; and its boiling point is 78 0C.) A mercury-in-glass thermometer can quickly response to temperature, while an alcohol-in-glass thermometer can only slowly response to temperature. However, mercury is poisonous and alcohol is NOT poisonous. Also mercury thermometers are not allowed on aircraft.
Which instrument is often filled with mercury or colored water or alcohol?
Thermometers are the instrument that is often filled with mercury, colored water, or alcohol. Most early thermometers were made with mercury.
Why does a piece of glass float in mercury but sinks in water?
B/c the density of mercury is higher than that of glass, while the density of water is lower than that of water.
Why are thermometers made with alcohol instead of water?
thermometers are made out of mercury and alcohol because mercury expands when it is heated
Which liquid will boil last water or mercury or alcohol?
water
What would be least conductive cooper salt water glass or mercury?
Glass
What does a thermometer contain water or Mercury?
If it's a silver liquid it's mercury, if it's red it's alcohol (not water)
What do water oil mercury and alcohol have in common?
They are All Liquid
Can mercury wet a substance?
Mercury is a metal unlike water which have hydrogen bonding. Mercury does not wet most substances, because of its high cohesion and low adhesion to the glass mercury will not wet glass. Cohesion, along with adhesion(attraction between unlike molecules), can help explain mercury phenomena. Mercury has a surface energy over 6 times greater than that of water so there is a much greater attractive force between the atoms of mercury than between the molecules of water, so mercury does not wet glass.
Which is better mercury or alcohol thermometers for low temperature measurements?
alcohol is best for both hot and cold (only in water) mercury is best for fire temps
This instrument is often filled with mercury colored water or alcohol?
Beaker
