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Great question!
You may notice that air bubbles form of the bottom of the flask, long before it starts boiling, but it can't be evaporation, because that only occurs at the surface, so what is it?
Well, as you know, there is oxygen "dissolved" in water (that is how fish and other marine life can survive in water). When water is heated, it actually not able to hold as much dissolved gas (which is the opposite of dissolved solids in water, the water can hold MORE when it is heated). This is because a gas is naturally more energetic then the liquid, so as it heats, its desire to escape from being dissolved grows faster then the liquids ability to hold it, so the water cannot hold as much.
Well, as it heats, the air begins to escape and form bubble. these often happen at the bottom of the flask, because that water is heated first and fastest (so air escapes from them the soonest).
What else can I help you with?
Is the volume occupied by the gas in the flask approxmately the same greater or less than before it was heated?
Assuming the flask is sealed - the volume remains the same but the pressure increases
Does the empty flask contain more air molecules at room temperature or after it was immersed in the boiling water bath?
The empty flask contains the same number of air molecules regardless of whether it is at room temperature or immersed in a boiling water bath. However, when the flask is heated, the air molecules inside gain kinetic energy, leading to increased pressure. If the flask is sealed, some air might escape when heated, but the total number of air molecules present in the flask remains unchanged unless affected by external factors.
If some of the gas bubbles escape the volumetric flask during the experiment atmosphere. Would the calculated molar mass of the gas be greater or less than the theoretical molecular value?
If gas bubbles escape the volumetric flask, the calculated molar mass of the gas will be less than the theoretical molecular value. This is because the number of moles of gas remaining in the flask will be underestimated, leading to a lower molar mass calculation.
Why is important to hold a flask at an angle while being heated?
Holding a flask at an angle while heating allows for better heat distribution and prevents localized hot spots that could cause the solution to boil over or splatter. It also helps to prevent superheating of the liquid and reduces the risk of flask breakage due to sudden boiling.
What probably happened to the temperature of the air the flask and the wood during the reaction?
During a chemical reaction, the temperature of the air surrounding the flask and the wood likely increased. This is because chemical reactions often release energy in the form of heat, known as an exothermic reaction. As the reactants in the flask and the wood underwent a chemical change, the energy released would have heated up the immediate surroundings.
Why does the egg go in to the flask when heated?
When an egg is heated, the protein present within it(the egg white), called albumin gets denatured. This is because protein structures break at high temperatures. As a result, the liquid albumin forms a thick white mass.
Why will there be air bubbles forming when water is being heated?
Air bubbles form when water is heated because the solubility of gases, like oxygen, decreases as the water temperature rises. As the water heats up, it releases dissolved air in the form of bubbles. Additionally, the bubbles can also come from impurities in the water or gases produced by chemical reactions occurring during heating.
Is Erlenmeyer flask good of heated solid?
The Erlenmeyer flask is not good for heating solids.
What will happen after some time when the empty flask was heated over the burner?
nothing , after a while the flask material will break down
How will you determine when the unknown liquid in the flask has completely vaporized?
You can determine when the unknown liquid has completely vaporized by observing if there is no more liquid condensation occurring on the walls of the flask or if there are no more bubbles forming. Additionally, a significant decrease in the weight of the flask may indicate that the liquid has vaporized.
Is the volume occupied by the gas in the flask approxmately the same greater or less than before it was heated?
Assuming the flask is sealed - the volume remains the same but the pressure increases
Why doesn't the evaporation flask have bubbles below the surface?
Bubbles could form if the liquid is boiling too vigorously, causing it to splash and create bubbles. However, in a controlled evaporation process, the heating should be gentle enough to prevent excessive boiling and bubble formation. Additionally, the rotating motion of the flask helps distribute the heat uniformly, which can reduce bubble formation below the surface.
Does the empty flask contain more air molecules at room temperature or after it was immersed in the boiling water bath?
The empty flask contains the same number of air molecules regardless of whether it is at room temperature or immersed in a boiling water bath. However, when the flask is heated, the air molecules inside gain kinetic energy, leading to increased pressure. If the flask is sealed, some air might escape when heated, but the total number of air molecules present in the flask remains unchanged unless affected by external factors.
What is the basic setup required for a simple distillation process?
The basic setup for a simple distillation process includes a distillation flask, a distillation column, a condenser, a receiving flask, and a heat source. The mixture to be separated is heated in the distillation flask, and the vapors rise through the column where they condense in the condenser and are collected in the receiving flask.
What happens when a flask is heated up with a burner after ten minutes?
If a flask is heated up with a burner for ten minutes, the temperature of the liquid inside the flask will increase. This increase in temperature can lead to changes in the properties of the liquid, such as expansion, evaporation, or chemical reactions, depending on the type of liquid and the temperature reached. It is important to monitor the temperature carefully to prevent overheating or boiling over.
Why is A crystal of iodine on heating in a closed flask turn into vapour and fills the complete flask?
Iodine sublimes directly from a solid to a gas when heated, without passing through a liquid phase. In a closed flask, the vaporized iodine molecules are unable to escape, so they accumulate and fill the entire volume of the flask. This process is known as sublimation.
What happen if a flask is heated on a flame with a wire gauze?
Heating a flask on a flame with a wire gauze helps distribute the heat evenly and prevents direct contact between the flame and the glass, minimizing the risk of the glass breaking. The wire gauze also helps to spread the heat more uniformly, reducing the chances of hot spots developing in the glass.
