Food Loss Lab Report

2. What is the difference between a'smart' and a'smart'? Suggest three sources of error in this experiment, not including human errors. The first error that could have occurred in this experiment applies to the heat loss within the calorimeter, particularly due to heat absorption by the device itself. As the surroundings lose heat to the calorimeter, this heat absorption can lead to inaccurate results because it lowers the change in temperature that is seen.

Aim: To plan, conduct, evaluate and report on an investigation of chemical changes, and make recommendations for their use as an energy source in Heat-and-Eat meal packs.

Introduction Calorimetry is the measurement of heat absorbed or released during a chemical reaction, and in this experiment calorimetry is used to measure the amount of calories in a variety of snack foods. This is related to the saturated fat content of said snack foods. The experiment is done by setting an apparatus to burn each piece of food under a soda can full of water, this is called soda can calorimetry. A unique setup was used to determine the caloric content in each snack food. The foods used were tortilla corn chips, Lays potato chips, Cheetos Puffs, and Doritos.

According to the data table, the Marshmallow was the heaviest while the Chex-Mix was the lightest. Also, the Cheetos trial produced the highest water temperature. During the trial process, four CHEEZ-IT’s broke when attempting to place the CHEEZ-IT on the paper clip. Also, during the first Cheetos trial the Cheetos did not burn entirely, so a second trial was done and the sample burned completely. The Chex-Mix burned the fastest while the Marshmallow burned the slowest. Several samples we’re slightly difficult to light with the match, also putting some of the samples onto the paper clip was troublesome. An environmental factor that affected the experiment was the excess CO2 in the air because all the lab groups were burning the snack foods

This study was performed to study the effects on what would happen to the mass of a bone from a chicken wing when the amount of sugar is increased in a liquid. The hypothesis for this lab was that when more sugar was added to the liquid, the more the mass of the bone would decrease over time. It was predicted that the gatorade would make the mass decrease the most and that the water would decrease it the least. It is known that sugar can increase body weight in fat (Greenfield), but sugar can also act as an acid in some cases (Goldschmidt). Our hypothesis was formed thinking that the sugar may act as an acid in this experiment. In this experiment the independent variable was the liquids and the dependent variable was the three chicken bones.

The metabolism of an organism represents all bodily chemical reactions to intake, actions, etc (Reece, et al. 2011). Metabolism is often referred to as the energy of life, since it is either acting to conserve or expel energy of an organism. This can be measured mathematically through a series of experiments. Examples of metabolism are differences of the heart rate from caffeine and ethanol. By understanding the topic, it can be proven that these drugs affect organisms in a certain way, such as the heart rate. The information, collected following the experiment, can be inferred in recognizing the way our body responds to chemicals when drinking coffees and colas. The experiment was conducted by inducing the species Daphnia magna to both caffeine and ethanol, while being compared to a controlled group. Daphnia magna are small crustaceans, commonly known as water fleas, which are transparent making them easy to study their metabolism (Corotto et al. 2010). Since caffeine is a simulative and ethanol is a depressant, it assumed that the heart rate would increase with the exposure of caffeine and decrease with ethanol compared to control. This will occur not only in Daphnia magna, but also all other organisms.

Purpose The purpose of this experiment was to identify which tree nut of the 4 that were tested (hazelnuts, walnuts, pecans, and almonds) had the highest energy content. Hypothesis If different tree nuts are tested for their energy content then the tree nuts with the highest amount of oil on its exterior (shell) will have the greater energy content, this is because the tree nuts with the greater oil content will catch fire at a quicker pace than the tree nuts with a smaller oil amount on their outer shell. Background information Calorimetry is how you measure the amount of heat that is let off during a chemical reaction.

This lab’s problem asked how the heat capacity of a lead sinker can be determined (Bridges 192). The hypothesis stated for the first experiment that if the lead sinker is heated in boiling water, placed in a calorimeter, and tracked consistently for the temperature, then the heat capacity of the lead sinker can be calculated because with the mass of the lead sinker, the original volume and mass of the water, and before and after temperature checks of the water, the data collected can be used with available formulas for heat capacity to find the heat capacity of the lead. This statement was not supported by the data for the first experiment because the margins of error were too great to affirm the hypothesis. Likewise, though there wasn’t a

Table 2 came from the Coca-Cola experiment. The information above is the data that should have been recorded throughout the experiment.

The goal of the experiment was to determine the effect that fertilizer has on the health of an aquatic ecosystem that consisted of ghost shrimp, Malaysian trumpet snails, and elodea. The organisms were added to mason jars filled with water, along with varying amounts of water soluble fertilizer, and placed in a well-lit, temperate environment and monitored daily using qualitative observations and with readings from a dissolved oxygen probe and test kit. The hypothesis of the experiment that stated that if 187.5 grams of fertilizer is added to the ecosystem, then all of the organisms will be killed off because the overabundance of nitrates and phosphates in the water will cause eutrophication to occur was not completely supported by the data

Even though the result of an experiment is accurate and matches the literature value, it does not mean that there were no mistakes made. As the difference of the percentage uncertainty and the percentage error suggests there were random errors made. First of them was the heat energy lost to the surrounding environment during the experiment process taking place. This caused the recorded highest temperature to be smaller than the actual highest temperature that was meant to reach. This could have been prevented by adding in more and perfect

This method of calorimetry is beneficial because it’s cheaper and more accessible than direct calorimetry. The direct method requires heavy and expensive machinery to measure the increased temperature of water surrounding a performing human. Although, this method is extremely accurate it is not as available to the doctors or researchers who’s patients would benefit by performing this test. For that reason, indirect calorimetric is a more practical method for the public.

The purpose of the lab was to test Parry’s stomach contents using the glucose, starch, protein, and lipid tests; and with the results, determine which restaurant most likely poisoned him.

The next clue to this being a modern short story is it implying facts and psychological truths rather than stating them. “But perfect, perfect little house. Who could possibly mind the smell?” I think that this introduction to the dollhouse is implying that it represents the upper class. It looks beautiful and gets everyone’s attention, but it has a bad smell of paint, like the arrogant and stuck up attitudes of the Burnells.

Carbohydrates are the product that made up from carbon, hydrogen and oxygen. Carbohydrates are form by the combination of carbon dioxide and water molecules. The carbohydrates contain two specific functional group in it which is the hydroxyl groups and carbonyl groups.A reducing sugar is a type of sugar with is an aldehyde group.This means that sugar can act as a reducing agent.The procces of reducing sugar is isomerisation,example of reducing sugar islactose,maltose,glucose and fructose.All monosaccharides are capable of reducing other chemicals such as copper (II) sulphate to copper oxide.Beside that disaccharides such as maltose and lactose are reducing sugar,however sucrose is non reducing