Calorimetry

Enthalpy of Dehydration of Sodium Acetate Trihydrate Purpose: In this lab, two solid substances, sodium acetate and sodium acetate trihydrate, will be analyzed for the heat of solution for both processes. This allowed the calculation of the molar enthalpy of dehydration of sodium acetate trihydrate. Calorimetry was used to experimentally determine the heat of solution for both reactions. Procedure: This lab was performed based on the procedure outlined in “Exp #7 Calorimetry.” No changes to the procedure were made. Data and Observations: All data and observations were recorded in the lab notebook. Pages from the lab notebook are attached to the lab. Results…

The objective of the lab is to find the calorimeter we used by determining the heat given off from pringles and calculate how much energy was released by the burning food substance. In addition, we can also use the concept of conservation of energy that energy cannot be created or destroyed. Introduction In order to complete the snack energy lab, calorie and calorimetry will be use as a major technique. By burning pieces of food, the chemical energy stored in molecular bonds is released as heat…

1. To start of with, make a chart to record all your data in 2. For each food sample, you will need to take two readings, one before adding the invertase and one after 3. Label 7 cups with the name of your drink you want to put in it (e.g. Coke) 4. Take 15 ml of each drink and put it in the right cup. (Make sure all the drinks are at room temperature) 5. Use a glucose urine test strip to measure the glucose concentration level in each of the 7 food sample before you add the invertase 6. To do…

Bomb Calorimetry is a valuable instrumentthat measures the energy content of food and chemicals. A substance inside of the Bomb Calorimetry goes through a combustion reactions which take place inside of a closed stainless-steel container surrounded by water. In this experiment, benzoic acid and Tollhouse chocolate chips will release energy through a combustion reaction inside of the stainless-steel container. The combustion reaction that occurs will cause the water surrounding the system to…

Introduction In this lab, the size of atoms and molecules in solids and liquids were estimated by using the cubical and spherical atomic model. The former model was used in a simple experiment that calculated the displacement in water and in this case, Aluminum and Copper were used. The spherical model was performed by finding the amount of amount of empty space within a sample of Lead shot. The molecular size in liquids and solids was found by calculating the density and molecular size of…

Procedure: Part A: Extraction stage 1. Place a 125 mL separatory funnel in a ring stand equipped with a small ring. 2. Heat the hot plate. 3. Heat the water (20 mL of hot water is needed) to a boil by placing it on top of the hot plate. 2. To the 125 mL Erlenmeyer flask, added two Tylenol (500 mg/ tablet) 3. Dissolved the solid by gently swirling the Erlenmeyer flask. 4. Let the solution cool for a few minutes (approximately till room temperature). 5. Add the mixture to the separatory funnel.…

The objective of the lab was to find the calorie content of Cheetos and marshmallows. To do this we needed to use a calorimeter. The hypothesis was that Cheetos would have more calories because they have more fat in them. The Cheetos and marshmallows were lit and put in an oatmeal can calorimeter. The temputure change in the water leads to finding the calories in food. Cheetos had about 3x the amount of calories at 1.66 calories per gram compared to marshmallows 0.57 calories per gram. With this…

1. Heat water in a pan or beaker until it is boiling vigorously. 2. While you are waiting for the water to boil, measure the mass of the metal with your scale. Remember to report your answer to one more decimal place than what is marked off by the scale. 3. Once the water on the stove is boiling, drop the metal into the pot and let it sit there for about 5 minutes. This will heat the metal to the temperature of the boiling water (100.0°C). 4. While the metal is heating, nest one Styrofoam…

To start this laboratory experiment, we first collected all the materials necessary including multiple beakers, samples of each solution, metal strips, a salt bridge, alligator clips, and an abrasive sponge. Then 10 mL of CuSO4(aq) and 10 mL of ZnSO4(aq) were placed into separate 250 mL beakers. A copper strip was then placed in the beaker containing CuSO4(aq) and a zinc strip was placed into the beaker with ZnSO4(aq). The two beakers were connected by a salt bridge that consisted of a string…

Moles 1.How is molar mass calculated and why is it useful? Molar mass is calculated by going to the periodic table finding each mass of each element in the compound then adding them all up based on how many of those elements are in the compound. 2.Define a mole in chemistry and give 3 examples equivalent units that are used in chemical calculations. Mole is considered the unit for amount in chemistry other units that are equivalent are atoms, formula units, and molecules. Gas Laws 3.How is the…