Calorimeter Lab

the purpose of this lab was to find heat capacity and to calculate the specific heat.

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.

Heat Energy is a form of energy characterized by vibration of molecules and capable of initiating chemical changes and changes of state NFPA 92. In other words, it is the energy needed to change the temperature of an object - add heat, temperature increases; remove heat, temperature decreases. ( fire.gov fire dynamics. July 2013.) Heat energy is measured in units of Joules. When enough heat energy is added to a substance, combustion can occur. Combustion is a reaction in which fuels react with a compound.

There are two types of energy: kinetic energy and potential energy. Kinetic energy is energy possessed due to motion, and potential motion is energy which

Introduction: The theory behind this experiment is the heat of a reaction (∆E) plus the work (W) done by a reaction is equal to

Using conservation of energy, the heat lost by the metal was the same as the one gained by the water/calorimeter system,

Calorimetry is the science of measuring the change in heat absorbed or released during a chemical reaction. The change in heat can tell us if the reaction is either exothermic - it released or heat into surroundings, or endothermic - it absorbed heat from surroundings. The device used to measure calorimetry is a calorimeter. A calorimeter can range from very expensive lab ones to coffee styrofoam cups but they are all tightly sealed in order to prevent heat from escaping.

There are many different types of calorimeters, coffee calorimeter measures the energy lost or gained by the water. Where as the bomb calorimeter measures heat exchanges with chemical reactions. Specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. The amount of heat for temperature change depends on the mass of the sample; heat is related to the mass and the degree or amount of temperature change. The Calorimetry equation is H=c x m (Tf-Ti), H= enthalpy, C= specific heat, M= mass of the system, Tf= final temperature, Ti= initial

2.5 Observations General observations of occurrences in the experiment include the idea that the experiment was not performed all on the same day, as well as being in performed in different ambient temperatures. However, the experiment was shielded from direct sunlight to prevent discrepancies in the volume of solvent passing through the semipermeable membrane. The water levels in the beakers of distilled water remained fairly constant at approximately 300ml. When the osmometer was removed from the beaker of solvent, there was also an immediate drop of the solution levels in the capillary tube. Conclusion 3.1 Conclusion One of the variables tested in the experiment was the effect of salinity on the osmotic pressure of an aqueous solution.

Calculate the heat of reaction assuming no heat is lost to the calorimeter. Use correct significant figures.

where p is the density, g is the acceleration due to gravity, h is the height of the solution and r is the radius of the capillary.

Calorimeters are devices used to indirectly calculate the energy output of burning fuels by measuring the changes of heat in a system which can then be converted to energy by known mathematical relationships. This investigation seeks to calculate the energy output of Ethanol and determine the optimal calorimeter apparatus for its combustion considering different types of insulation and the best substance in the Calorimeter to absorb the heat of the reaction.

They base it up, of the measurement of heat, which could be generated (exothermic), consumed (endothermic), or simply dissipate (science). The two basic types of Calorimetry are measurements based on constant pressure and then measurements based on constant volume. They have made a bomb Calorimetry. A calorimeter is the object measuring the heat transferred to or from an object (physics classroom). They have made a bomb Calorimetry; they mainly use them in the bigger labs. It has nothing to do with a bomb, the mainly fill the chamber with oxygen gas and the fuel. A wire is put in the system to electrically ignite the contents to perform the study. A jacket of water and a thermometer surrounds the reaction chamber, the heat released the chamber warms the water, letting the people doing the lab determine the energy that is being released (physics classroom). Another type of calorimeter is the coffee cup calorimeter. They take a Styrofoam cup with a lid. The cup is half way filled with water and a thermometer through the lid. When the reaction occurs in the cup, the heat will be absorbed but the water. The temperature will start to warm up (about). That is some history about Calorimetry, concept of energy, laws of thermodynamics, and types of

Thermodynamics is the study of work, heat, and the energy of a system (NASA, 2010). To help explain in more detail the properties of thermodynamics are the laws of thermodynamics. The first law explains that a system’s internal energy can be increased by adding energy to the system or by doing work on the system (Serway & Vuille, 2012). An internal energy system is the sum of both its kinetic and potential energies. The first law more simply states that the change in internal energy of a system is caused by an exchange of energy across the system, typically in the form of heat, or by doing work on the system. This relationship

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.