System And Surroundings Lab Report

Next are the methods that where done in this experiment. The materials used where: A digital Thermometer, human

Methods - In the beginning of the lab, the beaker filled with boiling water was taken off of the hot place and saran wrap was wrapped around it. After that, a thermometer was placed inside of the water. Next, the temperature was checked and recorded every two minutes over a course of twenty minutes. The temperatures were recorded to see quickly the temperature of boiling water decreased over time. All of the groups did the exact same thing except with different insulators.

Background: Calorimetry is the science of measuring the heat of chemical reactions or physical changes. Calorimetry is performed with a calorimeter. A calorimeter can be any container from a cup to a Calorimeters need to be well insulated as calorimetry relies on the fact that temperature change only occurs within the solution and that no heat escapes to the surroundings. That is why it is important that calorimeters are well insulated. However, heat loss cannot be avoided so scientists, when conducting experiments, need to choose the calorimeter that allows least heat energy to escape, therefore, retaining as much heat within the solution

The following materials will be gathered, a Coke Can Calorimeter, graduated cylinder, thermometer, ring stand, balance, a long thin stick, paper clip, matches, a marshmallow, a CHEEZ-IT, a Chex-Mix, and Cheetos. A Coke Can Calorimeter with a stick through the tab will be placed on the ring stand. An unwound paper clip will be placed directly underneath the calorimeter on the base of the ring stand. Water and a thermometer will be placed inside the calorimeter. The sample will be placed on the paper clip, so that the sample will almost be touching the bottom of the calorimeter. A match will be lit, and then will be used to catch the bottom of the sample on fire. A close eye will be kept on the thermometer to see when the temperature reaches

Hang the temperature probe in the hanging soda can and make sure the probe is hanging in the water and not touching the bottom of the can or the side of the can, one method of hanging the probe is using another ring above the original ring on the ring stand and drape the wire on the upper ring to let it hang in the water in the soda can dangling on the lower ring stand. Now, grab the matches and pick you the piece of food and prepare your timer and to start the

A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. (Britannica). It is through this redistribution of atoms that chemical reactions occur in many aspects of life on earth. These reactions occur both in the geology of the earth and in the burning of fuels.

The temperature probe was checked to make sure that it did not touch the bottom of the cup. Then, a graduated cylinder was used to measure 50 mL of 2M NaOH, which was prepared in Step 2. Next,

On the Meter screen in LabQuest, the data collection rate was changed to 1 sample/second and the data collection length was changed to 480 seconds. The temperature probe was lowered into the warm water, to approximately 1.00cm from the bottom, followed by clicking the “start” button to begin collecting data. The temperature reading, indicated in oC was displayed to the right of the graph. The maximum temperature was recorded, which symbolizes the initial temperature,T1, of the water. Once the maximum temperature was achieved, the styrofoam cup was filled with ice cubes.

In the day to day life people around the world are exposed to the amount of calories in many different food items. However, many of those same people don't know why the amount of calories are in the product theyŕe eating. With that being said, the experiment ¨The Heat Is On” directly focuses on how to discover the amount of calories in a product, by the exposure of heat. Therefore, the amount of energy in the food tested will also be found. The food items we decided to use in this experiment include a marshmallow, a cheeseball, and lastly potato shoestrings. Before the experiment, the hypothesis agreed upon was that cheese ball will contain the highest amount of energy. We intend to test our hypothesis through the experiment ¨The Heat is On” by finding the mass of the food product after it stops burning. All in all, the experiment ¨The Heat is On” the experiment my group went through to overall find the amount of energy in the food we tested.

At the 3 minute mark add the weighed sodium chloride into the water in the calorimeter and keep stirring.

This experiment consists of four methods, of measuring and weighing room temperature water using the different devices, each method repeated five times. Method one is to

What will be the amount of energy contained in specific snack foods? This question will be solved by using the heat energy equation, Q=mCΔT. “Q or q” will represent the heat in joules, this will be found algebraically by filling in the rest of the heat energy equation. “m” will represent the mass in grams, this will be found by finding the mass of the water. “C” will represent specific heat in Joules/grams °Celsius, the specific heat of water will always be 4.184 J/g°C. “ΔT” will represent the change in temperature, this will be found by subtracting the final temperature of the water by the original temperature of the water. Capital Q means that heat will be added-endothermic. Lowercase q means that heat will be lost-exothermic. The law conservation of energy says that energy will not be created nor destroyed, but will be converted from one form to another. The percent error equation will be (accepted-experimental) ÷ (accepted), accepted is the Cal/g on the snack food’s package, and the experimental is the Cal/g that is calculated during the experiment. The independent variable will be the Marshmallow, CHEEZ-IT, Cheetos, and Chex-mix. The dependent variable will be the energy in either Joules/grams or Calories/gram because the amount of energy depends on the snack food. The controlled variable will be the amount of water in the calorimeter because the water will be the same amount in every trial. A bar graph will be needed to determine which snack food

Place the calorimeter in the shield. Measure the temperature of water in the calorimeter. Check the thermometer reading after 2 - 3 minutes.

A chemical reaction is the “communication” (or interaction) between elements (Green, 2012). Chemical reactions can happen naturally or can be caused by a person. They can even happen inside of a living being (Newmark, 2000). Some chemical reactions can just happen randomly and others need different amounts of energy for them to occur. Heat can provide chemicals with the energy for this to happen. For example, dynamite is extremely sensitive to any shock. When it senses the sparks of a lit fuse, a fast chemical reaction between fuel and a source that will burn it causes the dynamite to explode (Newmark,

When the sodium chloride is added into the water inside the calorimeter, an endothermic or exothermic reaction will occur, indicating a change in enthalpy from the water to the solution. The digital probe will most likely give a more accurate reading of the temperature change, thus giving more accurate results.