In this experiment, we explore the fundamental rules of heat in reactions. We notice how heat flows from hotter to colder systems, we determine the heats of reactions and we test the difference or visualize the difference between exothermic and endothermic heat reactions. This goes hand in hand with our previous experiment, the specific heat lab.
We are reminded to wear out safety glasses at all times, of course; as is the case with every lab we carry out. The chemicals used in this lab, however, are toxic and corrosive in HCl and NaOH and are flammable in Magnesium metal. We are advised to prevent contact with skin and eyes as NaOH can easily be absorbed through the skin. If contact with NaOH were to happen, then we are advised to wash the area affected with cold water. Discarding of the waste solutions will all be through placing them in the ‘Waste Acid Base Container.’
For the first part, we carried out an experiment to calculate the heat of the HCl and NaOH reaction: I measured 75 mL of both 2.0 Moles of HCl and 2.0 Moles of NaOH. They were recorded at an average initial temperature of 20 degrees Celsius. After mixing them with one another, we measured the temperature to be at around 32.2 degrees Celsius. Measuring the change in temperature to be approximately 12.2 degrees Celsius and calculating the heat evolved through the heat formula to be about 7.6 kJ. We then carried out an experiment to
Chem 1212 Lab report Heat of Reaction In this experiment, we explore the fundamental rules of heat in reactions. We notice how heat flows from hotter to colder systems, we determine the heats of reactions and we test the difference or visualize the difference between exothermic and endothermic heat reactions. This goes hand in hand with our previous experiment, the specific heat lab. We are reminded to wear out safety glasses at all times, of course; as is the case with every lab we carry…
Abstract This lab is performed in order to determine the total energy in a reaction between zinc and hydrochloric acid. The reaction is done twice, once to measure the heat of the reaction and again to determine the work done in the system. This is because Enthalpy equals heat plus work (∆H= ∆E+W). Heat and work can be broken down further into separate components so the equation used in lab is ∆H=mc∆T + PV. Many calculations are used in the lab to find out what cannot be measured directly (ex:…
05/14/2013 7.1 Lab Report- Caloric Content of Food TITLE: LAB 7.1 CALORIC CONTENT OF FOOD PURPOSE: In this lab we will have the opportunity to measure the energy in a variety of foods, by heating/burning a portion of the food item and catching the heat released into a known mass of water in a calorimeter. We will also identify units of measuring heat such as calories and joules. We will use basic lab equipment provided in our labpaq and we will use several household items as well. We…
Honors Chem 10 February 18th, 2015 Background In this lab, one will determine which chemical reactions match up with the five possible types of reactions. In order to accomplish this, one will need to know the different signs that tell if a chemical reaction has been made. These visual clues include change of heat, formation of a gas, change in color, and the substance precipitating. The changing of heat means that the substance drastically changed colder or warmer. The for…
Lab #1: Qualitative observations of a chemical reaction. Introduction: The purpose of this lab is to carefully observe chemical reactions that go on and to try and interpret them. We are preforming this lab in class so that we can try and get a better understanding of what happens in a chemical reaction. In this lab we are trying to figure out what happens in a chemical reaction, and how it happens. This relates to our chemistry class because we just went over observations and inferences. Results/…
Lab Experiment 6 : Chemical and Physical Properties Lab Experiment 6 : Chemical and Physical Properties Purpose: The purpose of this lab is to test substances and to determine the physical and chemical properties of substances. Material matches, glassbeaker 100 mL, burner-fuel, goggles-Safety, stirring rod - Glass 1 test tube(5), 13 x 100 mm in bubble bag, test-tube-clamp-holder test-tube- cleaning-brush,well-Plate-24, well-plate, litmus paper, blue - in…
Chemical Separations 09/22/2013 Lab Date: 09/18/2013 Introduction/Background/Objective/Theory Lab 3 consisted of Physical and Chemical Separations. The lab is based on the concept of Conservation of mass. This simply means mass cannot be created nor destroyed. This includes chemical and physical reactions as well. Also, Heterogeneous are chemicals that are not completely mixed, and homogeneous are chemicals that have been mixed together completely. Lab 3 will be an example that this law…
Quantitative Determination of ∆H, the Heat of Reaction Experiment # 7: Calorimetry Affiliation: PCC Chemistry 222 ABSTRACT. In this experiment, the temperature changes that occurred during two processes were determined. The first process was the dissolution of a salt in water. The second process was the neutralization of an acid with a base. The experimental data gathered allowed the calculation of the sign of the heat of solution and the heat of neutralization. Many salts…
molar concentration of NaOH and specific heat capacity of calorimeter Damanjit Multani Anjana Paloor 20530184 Section 015 Casey Trader November 7th, 2014 Introduction The purpose of this experiment was to heat the dissolution of NaOH, determining heat capacity of the calorimeter and neutralization of a strong base with a strong acid. A heat of reaction, qrxn is the quantity of heat exchanged between a system and its surroundings when a chemical reaction occurs within the system at constant temperature…
IB Chemistry SL (8th Period) 03/03/15 Specific Heat of Copper Lab Background Information and Variables: This lab focuses on the Thermodynamic principle of Enthalpy (H), which is defined as the internal energy of a system at a constant pressure. It is more commonly applied as DeltaH, which is the change in both the energy of the system and the volume of its contents. Because in most systems there is a chance for outside interference that may allow for the escape of heat energy, the best method for obse…