Energy Content Of A Food Sample

Step 3: Use the thermometer to identify and record the temperature for room temperature, in your refrigerator, in your freezer, and then research the temperature of boiling water (do not take this temperature) and record them in Table 2.

Purpose: Weighing objects. Figuring out the density with an object by calculated volume and Archimedes’ Principle.

Drill a hole relatively larger than the thermometer in the lid of one of the jars. Only one lid needs to have a hole because the jars will be tested separately.

Measure 500ml of tap water in the 500cm3 beaker, then measure 5g of sodium hydrogen carbonate using the 50cm3 beaker and weight scale and place in the beaker of water, using the glass rod to dissolve it into the mixture.

9) Trial E: Remove the syringe and empty the beaker. Add a Thermometer to the beaker. Add 200 mL of Room Temperature water to the beaker and heat with a Bunsen Burner until it reaches 100° C. Remove the Bunsen Burner. Repeat Steps 5 & 6.

will open in the Calorimetry laboratory with a calorimeter on the lab bench and a sample of

Weigh the beaker with water in it, record this value in Data Table 1 and subtract the mass of the beaker to get the mass of the water. Record this value in Data Table 1.

Procedure: This lab starts off by making sure the logger pro and temperature probe are in proper condition. Then, the data collection must be adjusted to 15 minutes and 12 samples/ min. After that a Bunsen burner must be set up by assembling a ring-stand, ring, and wire gauze, and a crack-less beaker is used to boil some water. First the beaker and the large watch glass need to be weighed and the mass has to be recorded using a triple beam balance. Next, the beaker with 200g of ice is placed on the ring stand, and immediately heated over medium flame. An important note is to make sure the flame is perfectly adjusted so the ice does not melt on the counter while trying to adjust the flame. Furthermore, place the temperature probe in the ice so it is not resting at the bottom of the beaker, it is best to secure it with a small clamp. Additionally, click the green start button on the computer and stir continuously with a glass rod until the ice is completely melted. Once the ice has melted which is somewhere between 3-5 minutes, the stirring rate will slow

Wash a crucible and cover. Heat in the coolest part of the flame for 3 minutes to dry. Allow to cool, then measure and record the mass of the crucible and cover in the data table.

Calorie intake was measured by the change in weight of the container before and after the meal.

Shortly after the food is done burning, use a stirring rod to mix the water in the soda can

Clean a cuvette with deionized water and refill it ¾ full of deionized water. Place the “blank” cuvette in the calorimeter and select the 565nm wavelength. Press and hold the CAL button until the red light stops blinking to zero out the calorimeter with the blank. Remove the blank and discard the water.

The procedure for this lab was to first get a petri dish and weigh the dish before putting the same into the dish. Next, we received the Jell-O sample in our petri dish and then weighed the dish. Then we subtracted the weigh of the dish to get the weight of our Jell-O sample. Afterwards

Measure the correct amounts of sugar and water into each of the labeled cups. One at a time, place a cup on the scale and add the sugar directly, but before you do so, hit the button “on” or “zero” to restart the scale. This way, the scale will only measure the amount of sugar that is poured into the cup and not the cup itself. The chart shown below will tell you how much sugar to weigh in each cup. Once you have finished, add 50 mL of water to each cup using the graduated cylinder. Then stir your cups with the spoon until the sugar has dissolved in each solution.

Rinse the thermometer with tap water and dry. Insert the thermometer in the calorimeters top and measure the initial temperature of the base 28.2∘C