How Do Substances Affect The Freezing Point Of Ice

Terms and Concepts To do this project, you should do research that enables you to understand the following terms and concepts:

Physicists used to believe that ice became slippery when it was exposed to applied pressure. They believed that when a person went ice skating, the pressure from the blade caused the topmost layer of ice to melt. The thin layer of water allowed the ice skate to glide easily over the surface. The other theory is that ice is just slippery, because the outermost layer never turns to a solid. According to this theory, the water molecules at the surface of the ice move more, because they're at the edge and there aren't any molecules above them to help keep them in place. Intuition tells us that liquids are mobile and that their presence reduces friction between solids, which is why water on the floor can cause someone to slip. Yet ice is frozen

Introduction The objectives in this laboratory were to be able to calculate the freezing point depression among three trials of unknowns, be able to correctly measure the freezing points of p-xylene, and to be able to calculate the molar masses of the unknowns by found freezing point depression values. This was done to be able to understand and apply a concept names supercooling. Supercooling is when a liquid is put far under its original freezing point and remains a liquid or gas. This happens when a substance is cooled so quickly that it’s easier for it to stay a liquid than to crystalize, until it reached its nucleation point and begins to heat up returning to its freezing point (image 4). The supercooling of p-xylene was observed in three

Does the different type of liquid affect how fast an ice cube melts? Procedures Buy liquids Test 4 times Track and write down the data Find conclusion Materials Sprite Coke Water Vinegar Ice ( From Fridge ) Cups Timer On Iphones, we have more than 4 iphones and we only

After each of the solids were completely dry, each was placed into a MelTemp device. The temperature at which each solid began to melt and completed melting was recorded.

The first part of the lab began by one lab member adding 10.0 mL of DI water to a test tube while another lab member obtained a beaker full of ice and salt. After both these steps were complete the test tube was put in the beaker full of ice. Immediately following the test tube be being placed in the beaker, a temperature probe was inserted into the test tube. The initial temperature was recorded and after the temperature was recorded in 30 second increments. Once the water exhibited supercooling and then remained consistent at .1 °C for 3 readings it was determined that the water had froze and formed crystals. Evidence that crystals formed allowed for it to be confirmed that the water actually hit freezing point at .0

INT Task 3 Does Salt make Ice melt Faster? Project Plan Salt is known to be used on icy roads in certain areas of the country in the winter season to help clear roadways to make them safer for travel. Salt causes a reaction that lowers the freezing point of water. In this experiment we will test this method of applying salt to ice to see if for certain this is true, and how much faster the salt melts if so. In this experiment, the Independent Variable will be adding Salt to the ice and the Dependent variable will be the time it takes the ice to melt.

2) When water freezes there are additional hydrogens bonds formed between molecules and those molecules become slow.

| | | | | Ice Melting Experiment and Analysis | INT1 Natural Science Task 3 | Ice Melting Experiment and Analysis ------------------------------------------------- Objective The objective of this experiment is to test the melting point of ice against different variables. I will use a control of ice against air and test this next to ice in water, sugar on ice, salt on ice and Baking Soda on ice. By measuring the melting time of each element on an ice cube I will be able to tell which element affects ice’s melting properties at what rate.

The first step is to help the injured person lie down, and it is better to be on the blanket to maintain the body temperature. This step is important because the affected area should be rested. For example, if your child has bleeding in the elbow or shoulder, moving his arm should not be allowed, and not use it to lift or carry things. Similarly, if he has bleeding in his joint or muscle, he should not walk as much as he possible until it heels.

The incorrect chemistry is that Olaf was in the water. This is incorrect because ice cannot be placed in warm water because it will acquire heat and turn from solid state to a liquid state. The heat is always transmitted from the hot body to the cold body. The hot body loses heat and the cold body acquires heat. Ice melts at 32 degrees Fahrenheit (0 degrees Celsius) During the transformation process, the temperature remains constant at 32 degrees Fahrenheit (0 degrees Celsius) until all ice is turned into water.

1. The results that were recorded on the line graph and the table shows that the starting temperature (0mins) of the ice was -2°C. During the first minute where the temperature rose from -2°C to 11°C was the biggest incline of the results. The temperature rose by 13°C.The temperature continued increasing until it reached 2 minutes where it stayed on 23°C for a minute. The temperature increased by the third minute, but it did not have as big as a incline during the first two minutes. The average temperature incline between the third and sixth minute was only by 3°C per minute as shown in the table, which was not as big as the 11°C incline. By this point, the ice (solid) had already melted into water (liquid). By the time the time reached

Ice is one of the first indicators of global warming actually occuring and it is important for research to be done on these layers of before they disappear. The recession of glaciers and the fragmentation of ice caps has been a clear sign to many that rising temperatures are having an impact, even on our very lives.

Background Information In order for water or milk to freeze, the temperature needs to be at or below 0ºC. In order to lower the freezing point of solution, different solutes are dissolved in solvents. When a solute is combined with a solvent, such as dissolving sugar (solute) into water (solvent), a solution is formed. The process of decreasing a freezing point of a liquid by dissolving a solute in a solution is referred to as freezing point depression. The freezing point is a colligative property, which means that the freezing point depends on the number of solute particles dissolved in a solution. For example, CaCl2, which has three particles, would lower the freezing point of a solution more than NaCl would, which only has two particles (Helmenstine).

Melting Points Elizabeth McGrail Organic Chemistry I 25 January 2013 ABSTRACT The objectives of this lab are, as follows; to understand what occurs at the molecular level when a substance melts; to understand the primary purpose of melting point data; to demonstrate the technique for obtaining the melting point of an organic substance; and to explain the effect of impurities on the melting point of a substance. Through the experimentation of three substances, tetracosane, 1-tetradecanol and a mixture of the two, observations can be made in reference to melting point concerning polarity, molecular weight and purity of the substance. When comparing the two substances, it is evident that heavy molecule weight of tetracosane allowed