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In Benedict's test, heat is applied to help facilitate the redox reaction between reducing sugars and the copper (II) ions in the Benedict's reagent, leading to the formation of a colored precipitate. In the alcohol emulsion test, the presence of lipids is indicated by the formation of a white turbidity or opaque layer when lipids are mixed with alcohol and water, and heat is not necessary for this observation.
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How many calories of heat does it take to raise the temperature of one gram or ethyl alcohol by 1 degree centigrade?
It takes 2.44 calories of heat to raise the temperature of one gram of ethyl alcohol by 1 degree Celsius.
Process of changing alcohol to water carbon dioxide and energy called?
The process of changing alcohol to water, carbon dioxide, and energy is called oxidation. This chemical reaction involves the breaking down of alcohol molecules into simpler compounds, releasing energy in the form of heat and light.
What happen to water moulcule as heat is applied?
As heat is applied to water molecules, they gain energy and begin to move faster. At a certain temperature, the water molecules gain enough energy to break the hydrogen bonds holding them together, causing the water to turn into water vapor (gas) through the process of evaporation.
Is mordant used in acid fast stain?
Yes, a mordant is used in the acid-fast stain technique. The mordant used is heat to help drive the primary stain, usually carbol-fuchsin, into acid-fast bacteria, such as Mycobacterium species, which resist decolorization with acid-alcohol.
What is the purpose of the heat during the acid fast staining procedure?
The heat is used to drive the primary stain, carbol fuchsin, into the waxy cell wall of acid-fast bacteria. This allows the stain to penetrate the mycolic acid in the cell wall, making the bacteria resistant to decolorization with acid-alcohol.
Can alcohol alter heat dissipation?
Either consumed or applied to the skin, alcohol increases heat dissipation.
What chemical does the rubbing alcohol have that makes it stingy when applied to wounds?
Rubbing alcohol, or isopropyl alcohol, contains a compound that causes a cooling sensation when applied to the skin. This compound, when it comes in contact with the skin, evaporates rapidly and draws heat away from the body, creating a stinging sensation.
How do you get lice off a curling iron?
Unplug the device, and sterilize with isopropyl alcohol applied to a washcloth, then allow the alcohol to evaporate. Even turning on the device should kill them due to the heat, but it's a good idea to use alcohol first.
Why does rubbing alcohol feel cold when applied to your arm?
Rubbing alcohol feels cold when applied to the skin because it has a lower boiling point than body temperature. As it evaporates quickly upon contact with the skin, it absorbs heat from the surrounding area, giving a cooling sensation.
What has a higher specific heat water or rubbing alcohol?
rubbing alcohol has higher specific heat
Why is alcohol used to absorb heat?
Alcohol does not absorb heat. It is used, because it evaporates quickly, thus drawing heat away.
What is the stain solution when chemical is test for sugar?
It is normally benedicts solution. Add about 1/4 of the total sugar solution to a test tube and heat it in a hot water bath at around 50 degrees C for 5 min. For example, heat 40mL of sugar water (C12H22O11 aq ) with 10mL of Benedicts soluton (copper and sodium salts). If it is a positive test it will turn yellow.
How does alcohol cause heat stroke?
alcohol causes dehydration which makes you more vulnerable to heat stroke
Is it true or false that alcohol lets heat escape the body?
Alcohol helps heat escape the body.
What happens to the density of a fluid when heat is applied?
The density of a fluid goes down (becomes less dense) when heat is applied.
How do you heat a small amount a alcohol in a test tube?
heat the test tube in inclined position..alcohol is a hydrocarbon
Does alcohol or water lower down temperature faster?
Alcohol evaporates faster than water, so it can lower temperature quicker when applied to the skin. However, water has a higher specific heat capacity and can absorb more heat before changing temperature, making it more effective for cooling over longer periods of time.
