Every chemical element or compound have specific properties that make them different than the other. However, these properties help us to understand every element or compound in which they can be used and how we can deal with them. These properties can be chemical properties which are defined as "that property must lead to a change in the substances ' chemical structure", such as heat of combustion and flammability ("Physical and Chemical…"). Also, these properties can be physical properties which are defined as the properties "that can be measured or observed without changing the chemical nature of the substance", such as mass, volume, boiling and freezing points ("Physical and Chemical…"). These two properties are related to each other. For …show more content…
Then, placing the thermocouple in the test tube to monitor the temperature by the labQuest. After a couple of readings of the solution in the hot bath, the test tube with the thermocouple inside it, should be transferred to the ice bath to monitor the temperature for a fixed length of time while the reading still running. This method should have been performed for all the trails with no additives for the trail …show more content…
I was able to consider the data for the all the trails except the first one. The first trail cannot be considered because the readings conducted differently. So, the freezing point of the first trail was not determined in this experiment. I had to find the freezing point from out side references so I can compare it to the other readings in the other trails. The freezing point for the tert-Butanol is below 25o C ("Tert-Butanol."). As we can see in the table above the freezing point was decreasing as we go down. In this experiment, I was able to change some chemical properties that led to a change of the physical properties of the tert-Butanol. As the additives had been added to the solvent, the chemical construction of the molecules (intermolecular) of the solvent and the solute was changed. This new construction of the molecules will require different energy to boil or freeze the solution. However, the solution gained new properties from the solvent, which caused the freezing point to decrease. In the second trail, I added a smaller amount of the Benzoic acid to the tert-Butanol than trail 3. Smaller mass of Benzoic acid caused smaller difference in the freezing point. In the last trail, I added the Camphor to tert-Butanol which caused the biggest different to freezing. The Camphor had the major effect on the freezing point of the
First, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder. This water was then poured into the styrofoam cup that will be used to gather the hot water later. The water level was then marked using a pen on the inside of the cup. The water was then dumped out, and the cup was dried. Next, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder, and the fish tank thermometer was placed in the water. Once the temperature was stabilizing in the graduated cylinder, the marked styrofoam cup was filled to the mark with hot water. Quickly, the temperature of the regular water was recorded immediately before it was poured into the styrofoam cup. The regular/hot water was mixed for a couple seconds, and the fish tank thermometer was then submerged into the water. After approximately 30 seconds, the temperature of the mixture leveled out, and was recorded. This was repeated three
The procedure of the lab on day one was to get a ring stand and clamp, then put the substance in the test tube. Then put the test tube in the clamp and then get a Bunsen burner. After that put the Bunsen burner underneath the test tube to heat it. The procedure of the lab for day two was almost exactly the same, except the substances that were used were different. The
However, the increased temperature of the new acid solution was at a greater temperature than the ambient temperature and the temperature of the water. This suggests that some of the results obtained were partially due to the fact that some of the heat energy of the acid was transferred to the water, as well as the hydration of ions present in solution. An improvement would be to create the solutions of desired concentration and allow them to reach thermal equilibrium with the surroundings. This would allow more accurate results and the allow for the assumption that the temperature change observed during the experiment would only be due to hydration of
In this experiment, we tested how the sugar cubes dissolve from different water temperatures. During the lab we made sure to make accurate and precise measurements, so what we did was do the same exact procedure to every section of the lab.
After researching this, I took the distilled frozen water I had frozen, and mixed it with distilled cold water. I mixed the two together and let them set. I then took the thermometer that I was calibrating, and recorded the temperature. I watched the thermometer drop from about 60°C all the way down to -1°C after it completely stopped moving. I took the thermometer out, recorded what I saw, and repeated this two process two
The data which was collected in Procedure A was able to produce a relatively straight line. Even though this did have few straying points, there was a positive correlation. This lab was able to support Newton’s Law of Heating and Cooling.
To put it another way, properties are what make up an object, and substance is what the
By adding fresh cold water it should cool the copper calorimeter. By making sure I do these checks before I do the experiment means that I should be able to get accurate results as the test will have been run fairly and hopefully successfully as there should not have been anything gone wrong. To make sure all the measurements are correct, I will also run checks. These checks when recording the data are. Make sure to check the thermometer to see what temperature the water is at the start, so I am able to see what it has to be when its been heated by 10 degrees.
In a 100ml beaker 30mls of water was placed the temperature of the water was recorded. 1 teaspoon of Ammonium Nitrate was added to the water and stirred until dissolved. The temperature was then recorded again. This was to see the difference between the initial temperature and the final temperature.
understood in terms of the differences between the properties of an object and those of other objects.
Chemical changes are when substances combine to form a new substance which is called synthesis and are usually irreversible. A chemical reaction causes atoms in the substances to rearrange and change their properties or composition therefore resulting in at least one new substance. Chemical reactions can also cause the decomposition of a substance resulting in two or more different substances. There are many manmade and natural chemical changes that happen everyday. Two main natural chemical changes are; combustion e.g; wood burning, and the metabolism in the human body. Two man made chemical changes are; gas bombs which are used in the military, and the rusting or iron (nails).
From the unit of chemistry in grade ten science, the students have learned many things from different types of elements in the chart all the way to how each element impacts the daily life each student or even adult lives in. Some of the things I as a student have learned include how to draw the different elements in a bohr rutherford diagram, balancing chemical equations, types of chemical reactions, and even information about the different types of acids and bases. Although there were many other things in the unit, these four definately helped me learn about chemistry in a more in-depth way, as well as teaching me something very new since these were some things a few of the students had never done in the previous years. Learning this in the classroom has really opened my eyes to the world in which we live in today, many times I leave the house on a cold day and as I look upon the cold water becoming ice or even the snow falling down, I know how it is happening, why it is happening, and I can even picture the molecules solidifying as we had seen in class with many different diagrams.
Spectroscopy basically involves the study of the interaction of radiated energy with matter. These different radiations could be used to study chemical and physical material properties of different atoms. Colors of light differ in wavelength and energies and when they interact with matter, the light is either scattered, reflected, transmitted, absorbed, reflected or fluorescence. The interaction makes vibrational, electronic or nuclear changes in energy levels. This difference between energy levels includes a range of electromagnetic spectrum. Types of electromagnetic radiation include gamma rays, x-rays, ultraviolet, visible, infrared, microwaves and radio wave. Energies, wavelengths, frequencies, or wave number can be used to describe the radiations.
Since the days of Aristotle, all substances have been classified into one of three physical states. A substance having a fixed volume and shape is a solid. A substance, which has a fixed volume but not a fixed shape, is a liquid; liquids assume the shape of their container but do not necessarily fill it. A substance having neither a fixed shape nor a fixed volume is a gas; gases assume both the shape and the volume of their container. The structures of gases, and their behavior, are simpler than the structures and behavior of the two condensed phases, the solids and the liquids
I find myself innately interested in Chemical Engineering. Every aspect of chemistry intrigues me especially in terms of creation and invention. Playing LEGO in my childhood days is the basis on how my enthusiasm towards invention has developed. Those building blocks made me believe that it is possible to create anything that I want. LEGO forced me to think creatively and critically on how to sort the blocks so my building did not fall down. Apart from that, helping my mother cooking regularly has increased my understanding of chemical combinations too. I have to deal with myriad ingredients to make the food taste better. If I put in the incorrect amount of ingredients, the taste will be altered, in most cases, for the worse. I could never hide my love as well as curiosity on how a molecule of salt can affect the cuisine. Thus, the idea of chemical invention has left me with a burning desire to learn more about Chemistry.