Heats of Reaction Lab

This data was from part two of the lab. The table below shows the food samples, the number of pieces in each sample, the mass in grams of each sample, the final water temperature, the initial water temperature, and the water mass in grams. Sample Water Mass (g) Mass of Sample (g) Pieces Final Water Temp (ºC) Initial Water Temp (g) M&Ms 600g 1.830g 2 37.02ºC 21.74ºC 600g 2.724g 3 42.14ºC 19.21ºC Skittles 600g 1.100g 1 28.95ºC 21.48ºC 600g 2.200g 2 39.44ºC 24.49ºC Marshmallows 600g 6.030g 2 51.93ºC 19.96ºC 600g 3.015g 1 34.10ºC 18.12ºC Doritos 600g 1.753g 1 32.88ºC 18.45ºC 600g 3.506g 2 49.81ºC 20.97ºC (Table 2: data from part two of the experiment.) The data below is from the data analysis section, which is stemmed from the second part of the lab. It shows the number of calories per gram for each food sample, as well as their individual ranking of number of calories per gram. Food Sample Calories/gram (cal/g) Ranking of highest number of calories per gram Skittles 7.47 cal/g 4 M&Ms 15.28 cal/g 2 Marshmallows 31.97 cal/g 1 Doritos 14.43 cal/g 3 (Table 3: Types of food samples and their number of calories per gram.)

=31.97 Joules/g Doritos: Joules/g= 25.30 Joules 1.753 g =14.43 Joules/g •1 Calorie= 4.184 Joules (2b) Skittles: 7.47 Joules 1 gram • 1 C alorie 4.184 Joules =1.79 Cal/gram M&Ms: 15.28 Joules 1 gram • 1 C alorie 4.184 Joules =3.65 Cal/gram Marshmallow: 31.97 Joules 1 gram • 1 C alorie 4.184 Joules =7.64 Cal/gram Doritos: 14.43 Joules 1 gram • 1 C alorie 4.184 Joules =3.45 Cal/gram After the experimenter found the number of calories per gram, they could now correctly rank the food samples. The order went: marshmallows, M&Ms, Doritos, and Skittles. These results were not what the experimenter expected. The experimenter based the calories per gram off of the density of the sample and the number of sugar/additives in the sample. Conclusion: The purpose of this experiment was to observe how heat transfers to water from various objects. This was done so the experimenter could know how heat transfers between objects and how many calories are in a gram of different food types. This was achieved due to the fact that