# Molar Heat Of Fusion Of Ice Lab Report

1006 Words 4 Pages
Procedure: Before beginning each experiment, remove all clutter from the workstation and read the directions for the experiments thoroughly.

Part 1: Warm slightly more than 300 mL of water to approximately 70 degrees Celsius. Measure out 150 mL of water into the coffee cup calorimeter. Take the temperature of this water in the coffee cup calorimeter once it has reached a steady temperature. Then, add an ice cube approximately the size of a large marshmallow. Stir the ice and water and measure the lowest temperature of the liquid once the ice has completely melted. Measure the final volume of water. Repeat this sequence twice more, so that there are three sets of data.

Part 2: Start heating approximately 3 inches of water in a pot on the
Measure the temperature of this water in the calorimeter. Take the temperature again of the boiling water in the pan with the one test tube in it. Transfer the contents of the metal in the one test-tube to the calorimeter, stir, and immediately take the temperature of the water in the calorimeter.

Discussion Questions:

Part 1

1. Calculate the percent error in your determination of the value for the molar heat of fusion of ice. The accepted value for the heat of fusion of ice is 6.01 kJ/mol. The percent error formula to be used is as follows:

Percent error = theoretical value - experimental value x 100 theoretical value

The percent error for trial 1 is 38%. The percent error for trial 2 is 42% and the percent error for trial 3 is 47%.

2. In order to do the calculations, you had to assume that all the heat lost by the hot water was absorbed by the ice, and that the transfer was within a perfect system. Was this assumption correct?
We also assumed that the mass given for the metal was correct. Additionally we assumed that pressure remained constant. Finally, we also this experiment was taking place in a perfect system by an accurate calorimeter. These assumptions may have introduced error.

3. If you had a sample of an unknown metal, how could you determine the identity of that metal? Describe how you would design and carry out an experiment to identify a metal.

In order to determine a sample of unknown metal, we could perform the same experiment as part two and compare the specific heat capacity calculated to that of known metal quantities. Furthermore, should the sample metal have a specific heat capacity near two different substances such as the .0092 cal/gºC for copper and zinc we could also measure mass and volume, to calculate density and compare it to known densities of metal.

4. Water has a high specific heat. How does this high specific heat of water account for the moderate temperatures of coastal

• ## Essay On Freezing Point Experiment

Close the large test tube, and adjust the thermometer and the stir wire. Immerse the test tube into refreshed the ice-water mixture. 14. Cool the solution to about 15 oC and start recording the temperature in 15 sec intervals. Continue cooling until the solution is frozen and you obtain at least 5 measurements after the appearance of the…

Words: 1578 - Pages: 7
• ## Synthesis Of P-Benbenediazonium Chloride Lab Report

Stir the solution and heat it until the solid dissolves. Now add 6.5 mL of HCl to this solution. Cool thoroughly in an ice-water bath. In a separate beaker, make up a solution of 3.7 g of sodium nitrite in 10 mL of water. Take a small beaker and weigh out about 5 g of ice and pour it into the conical flask having the reaction mixture.…

Words: 2234 - Pages: 9
• ## Thermodynamics Of Potassium Nitrate Dissolving In Water Essay

Stir the KNO3 in the distilled H2O until all the KNO3¬ dissolves. 5. Remove the test tube from the water bath and keep stirring the contents until potassium nitrate crystals start to appear. 6. Record the temperature this occurs at and continue stirring until all of it has crystallized again.…

Words: 1221 - Pages: 5
• ## Camphene Synthesis

For the first synthesis reaction, camphene was converted to isobornyl acetate. In the fume hood, a sample of 1.36 g of camphene was added to a 25-mL round-bottomed flask along with a stir bar. To dissolve the camphene, 3.0 mL of glacial acetic acid was added into the flask. The flask was fastened onto a ring stand and immersed in a water bath that was on top of a stir plate. A thermometer wire was placed in the water bath to monitor the temperature throughout the experiment.…

Words: 1013 - Pages: 5
• ## Calorimetric Determination Of Enthalpy Of Sodium Sulfate

Cool water was placed into the calorimeter and its temperature recorded, while an equal weight of water was heated to 35.3 ⁰C. The heated water was immediately poured into the water in the calorimeter and the temperature was recorded. The water equivalent of the calorimeter could then be calculated. Approximately 100 g of cool distilled water was placed into the calorimeter and the initial temperature recorded. Solid sodium sulphate decahydrate crystals of 4.00 g were added to the water in the calorimeter and stirred until it dissolved.…

Words: 1185 - Pages: 5
• ## Essay On The Boiling Point Of Pentane

Then the team put some hot water inside a Styrofoam cup to measure the temperature and the team watched the difference between the time and the temperature. Later, the team measured the boiling point of pentane approximately to be 32.4690 Celsius. Then the team used another test tube with Acidic Acid in it and it was inserted to a Styrofoam cup filled with ice to measure the freezing point. The team observed the change in the temperature and how it decreased noticeably at first then it started to decrease in a more stable way. The team measured the freezing point of Acetic Acid, which was 13.884 Celsius.…

Words: 703 - Pages: 3
• ## Animal Training Research Paper

Ice cream requires many steps on processing. When making ice cream, the mixture should be contained of nonfat solids, stabilizers, milk fat source, and emulsifiers. The next step is the pasteurizing of the mix. The mix should be heated 155°F for the minimum amount of thirty minutes. Homogenizing the milk is the next step, this decreases the milk fat to become smoother and creamier.…

Words: 1309 - Pages: 5
• ## Moistate Analysis: Proximate Analysis Of Mayonnaise

First of all, weigh 1.0 g of sample accurately in 250 mL digestion tubes by using analytical balance. After adding 1 tablet of Kjeltabs catalyst Cu 3.5 into the tube, add 12 mL of concentrated sulfuric acid, H2SO4 with caution, and shake the tube gently to moisten the sample with the appropriate acid. Connect the Exhaust system with the tubes which has been placed on the rack and ensure the aspirator system to start functioning. The rack and Exhaust system are locked to heaters block digester DS6 which has been preheated to 420 ̊C to begin the process of acid digestion. After about 5 minutes, turn off the aspirator system until acid fumes can be formed only in the top Exhaust system.…

Words: 1632 - Pages: 7