Questions-
Begin by observing and recording your observations on how each product affects ice.
Does it make ice melt or melt faster?
As you would think the distilled water would not have a significant effect it would freeze at an average temperature of 0 degrees celsius and freeze up for us at 4 degrees Celsius.
Product A did not do fairly well as product C at keeping the water from turning back into because it did not lower the temperature of the ices freezing point. It did the best at melting the ice and reaching a constant despite it in the beginning having fluctuating temperature it began to melt the ice the fastest.
Product B as you think did fairly the worst while it would be the slowest despite reaching a constant first it had not
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began melting rather staying at a constant state being ice while the ice was melting. It seemed as if B was slowing down the process at a lower temperature. Also realizing that keeping the water from becoming a solid again it did not do as well as we thought it would coming in third place after product A and freezing the second fastest. Product C is the substance that our hypothesis was built on.
We understood it would have the best performances in both fields. Despite product A coming in first place at melting the ice. Product C came in second place which would caused us to believe that product C performs best in both fields despite it not being the absolute best in melting ice.
Which product was most effective in melting existing ice?
Product A was the most effective in melting the ice. We understand this because despite our hypothesis they may have been a mess up in the procedure that led to this outcome but despite the fact product was A was the most efficient substance at melting ice. We know this because it reached a constant first and observing that it was melting the fastest to our surprise with product C coming in at a close second.
Determine which product was most effective in lowering the freezing point of water?
Product C did the best at lowering the freezing point of the water. We know this by studying the results of our lab, directly after all the other substances activated in the water work product C immediately sent the temperature from 20 degrees celsius to 0 degrees celsius in 30
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seconds. Draw or make a model to show the effect of dissolved solids on water molecules. In terms of particles, what causes dissolved solids to lower the freezing point of water? The solid particles get in the way of the water molecules to come closer and the dissolved solids make it harder for the water to freeze at a higher temperature so it forces the water to lower the temperature to get rid of the solid particles that are in the way of the water turning into a liquid.
The effect is that the freezing point lowers it causing the water more time to turn into a solid.
In terms of particles, why are some substances more effective than other in lowering the freezing point?
Because some substances have a strong dilute than others and dissolve more in the water. When we assessed our products in the test tube project C had the most unclear water due to its diluted form and realizing that the more particles in the water the harder it is for the water molecules to freeze at a higher temperature.
Why is the kinetic molecular theory important in understanding how and why matter changes state?
Because it explains that the Kinetic molecular theory is that molecules are at a constant random motion and the measurement of the average speed measures the temperature of the kinetic energy and understanding that the average kinetic speed decides which state of matter it is important for you to understand because if you don’t you won’t understand that kinetic energy is one of the major factors that determine the state of matter water may
exist. Conclusion- The answer to the first original question is Product A and this is because of how it melted ice the fastest during the procedure. The results clearly show that product did the best job at melting existing ice at a heightened temperature. Product C was the second closest to melt the ice and begin reaching a constant. The answer to the second original question is that Product C did the best at lowering the freezing point of the melted ice and keeping it as a liquid for the longest possible time. With those two answers we conclude that Product C has the best performance overall despite it not being the best substance at melting the ice. Product C is definitely the best product to buy. We would strongly recommend that the state highway department purchase product C for it’s effectiveness in both fields despite it being the second fastest to melt ice when the ice is melted it will keep the melted ice from turning back into it’s solid state and that is one of the most effective ways to avoid accidents. In the graphs below you can clearly tell that product C is excelling by reaching a constant of the melted water second and lowering the freezing point first so it would take longer for the melted ice to turn back to ice which is another strong reason why I think the state department should purchase the substance.
Paragraph 2: It is believed that as the temperature of the water increases the time it will take for the tablet to dissolve will decrease. This is believed since the temperature there will be more energy allowing the particles to get together and form a reaction allowing the ta...
question: Will the temperature of the water affect the speed of the dissolving Alka Seltzers?
As the temperature increases, the movements of molecules also increase. This is the kinetic theory. When the temperature is increased the particles gain more energy and therefore move around faster. This gives the particles more of a chance with other particles and with more force.
The temperature probe was placed into the test tube and recorded the temperature of the freezing solution using Logger Pro software. The test tube was held against the inner glass of the ice bath beaker so the test tube was visible to see when the solution froze over. Once the freezing point was measured, the temperature stopped being monitored and the data was recorded. The steps mentioned above for finding the freezing point, also known as ΔTf, was replicated for the 0.0, 0.4, and 0.6 concentrations. To find the freezing point depression, the equation ΔTf = imKf was used. The molality (m) of each solution was then calculated dividing moles of solute by kilograms of solvent, and the Kf value for magnesium chloride is known to be -1.86. Since magnesium chloride breaks down into three ions in deionized water, it was concluded that the Van’t Hoff factor couldn’t exceed three. For better accuracy, the experiment explained above for finding the freezing point depression and Van’t Hoff factor was re-conducted exactly the same to determine more accurate results. Again, the molality of each solution was calculated, and a graph expressing the change in freezing temperature verses molality
Also it would mean that the solution inside it would reach the exact temperature or close to it and not. increase or decrease once the water inside it has reached equilibration. The equilibration It was also very difficult for me to observe exactly when the
Mixed melting point was used to confirm the identity of the product. The smaller the range, the more pure the substance. When the two substances are mixed; the melting point should be the same melting range as the as the melting range obtained after filtering. If the mixed melting point is lower one taken from the crystals, then the two substances are different.
A characteristic property can help identify a substance. A characteristic property will never change even when the volume of a substance is varied. A characteristic property also does not change when a substance changes state in matter. A physical property cannot identify a substance. A physical property will change when the volume of a substance is varied. It can also change when the substance changes state in matter. For example, if the volume and mass of a substance changes then the physical appearance will also change. However, the density, which is a characteristic property, will not change at all. The boiling point of a substance is the temperature that a substance changes from a liquid to a gas. The boiling point of a substance is a characteristic property because the boiling point of a substance will never change even when the volume and mass changes. The only thing that will change is the time that it takes to reach that temperature. If the mass and volume of the substance is small, then it will take a small amount of time for the substance to reach the temperature. However if the mass and volume of the substance is larger, then it will take a longer time to reach the temperature. The purpose of this lab was to see if when the volume of a substance changes so does the boiling point.
The purpose of the experiment is to determine the temperature, in degrees Celsius, at which all particle motion stops (absolute zero).
In addition, the water is mixed with salt, which allows the cold pack to stay cool. The mixture that occurs between the salt and the water causes an endothermic reaction, which means that heat is absorbed. Due to the heat absorption, the temperature of the solution will decrease substantially. The cold pack experiment lab allowed us, the students, to apply theories learned in class to actual real life experiments; such experiments prepare us for future tasks the will be put forth to determine. Our main trajectory through this assignment was to determine what our unknown salt was, through experimental analysis.
Although Black’s discovery of carbon dioxide was said to lay the foundation for modern chemistry, it wasn’t the only discovery he is credited for. He was the first to conclude that heat and temperature were two different things. Black used water as a universal substance to show that heat is energy, in which may be transported through moving and colliding molecules and the idea that temperature is the measurement of the average motion or kinetic energy of the molecules. He demonstrated this with a bucket of ice monitored by temperature constantly. The ice continually melted, but the temperature remained constant. Black is also well known for his discovery of latent heat, the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature. Latent heat was con be expressed in two ways: the heat can be absorbed if the change involves solid to liquid or liquid to gas or the heat can be released if the change involves gas to liquid or liquid to solid. Black took this idea and developed “specific heat”, in which is defined as the measured amount of heat required to raise the temperature of a substance by a specified number of degrees.
Introduction: A phase change is a result from the kinetic energy (heat) either decreasing or increasing to change the state of matter (i.e. water, liquid, or gas.) Thus saying, freezing is the phase change from a liquid to a solid which results from less kinetic energy/heat. Also, melting is the phase change from a solid to a liquid which results from adding kinetic energy/heat. So, the freezing and melting point of something is the temperature at which these phase changes occur. Therefore, a phase change will occur when a vial of 10 mL of water is placed into a cup of crushed ice mixed with four spoonfuls with 5 mL of sodium chloride for 30 minutes. If 10 mL of water is placed in an ice bath, it will then freeze at 5 degrees Celsius because the kinetic energy will leave quicker with the ice involved. The purpose of this lab is to observe what temperature the water must be to undergo a phase change.
The hypothesis for this experiment was, If three different types of waters (saltwater, fresh water, tap water) are tested, then the liquids won’t evaporate at the same rate and tap water will evaporate at the fastest rate because it won’t have any non-volatile substances to hold it back from evaporating.
Pressure on the ice reduces the melting point. If pressure is afterward reduced, water will freeze again. This is called regelation. When a player skates across the ice, he or she applies a lot of pressure, leaving a trail of water where the blades were. Because the pressure leaves quickly, the water freezes to ice again (Haché 22). Nevertheless, pressure is not the only factor that causes this melting. Friction also takes part because it creates heat. With help...
Our task was to investigate what the optimum ratio of solute to solvent that will produce the maximum cooling/heating effect?
they break and the ice melts. Liquid water does not necessarily have all four hydrogen bonds