Measuring Specific Heat for Metals Objectives: 1. Hypothesize about the properties of the metal tested and/or the energy transferred. 2. Calculate the specific heat of the metal using your mass and temperature data. 3.
The calorimeter was designed in 1780 by a chemist named Antoine Lavoisier with help from a mathematician by the name of Pierre Simon de Laplace. Now a widespread tool, we will be using the calorimeter, and our knowledge of equations to find the specific heat of zinc and aluminum. OBJECTIVE/GOAL In this experiment we will Measure the mass and temperature of water in a calorimeter Heat a metal sample of a known mass to a specific temperature Calculate the change in water temperature caused by adding the hot metal sample Calculate the specific heat of the metal using your mass and temperature data PROCEDURE 1. Prepare a data table as directed in the Analysis. Safety goggles and lab apron must be worn for the experiment.
The moles of KNO3 s/ Kg solvent were needed to calculate the correct molal concentration. Another goal or purpose of this experiment was to calculate the heat of solution of each of the different concentrations. The inverse temperature and a linear plot of the molal concentration were needed to calculate this. The linear equation needed to calculate this was In(s)= -( H/ 2R)(1/T)+(1/2) where R is a constant and T was the temperature. The linear regression model could also be use to approximate the heat of solution.
Introduction A titration was carried out in this experiment to find the concentration of hydrochloric acid is an unknown solution. The aim of this experiment is to determine the number of moles of sodium hydroxide in hydrochloric acid and then to determine the number of moles of sodium hydroxide present in gastric juices. Titration, or volumetric analysis, is a common laboratory procedure for the analysis of substances and solutions. In a titration, the analyst determines the volume of a solution, called a titrant, that reacts exactly with a known weight or volume of another substance. This reaction is carried out by adding a solution of reactant hydrochloric acid from a burette to a solution of sodium hydroxide until just sufficient of hydrochloric acid has been added to react with all of the sodium hydroxide.
The term Cp is the specific heat of the material (at constant atmospheric pressure). Different materials have different specific heat values. The units of specific heat are : Joules/gram deg – C. In this lab we will find the specific heat value of Zinc and compare it to accepted values.This will do by heating a mass of Zinc up to the temperature of boiling water and placing the hot metal into a cup of cold water. The thermal energy that the zinc loses goes into heating up the water in the cup. By knowing the starting temperatures and the final temperature of the water and the zinc, the specific heat of Zinc may be easily obtained.
Obtain a boiling tube, a large test tube and a small test tube. Label the boiling tube “R” 2. Using an electronic balance, weigh out two grams of granular zinc and record the mass. Weigh out two grams of iodine crystals, record the mass and add this all to the boiling tube labeled “R”. 3.
The lab involved determining the thermal conductivity by electrically heating a sample at one end and water cooling it at the other this gives a linear relationship between temperature and distance form the source which may be manipulated to calculate the thermal conductivity of our material. There is more detail in both the theory and the procedure. This lab has made me consider all the applications of thermodynamics in the modern world and has made me aware of how many applications Introduction The aim of the experiment was to determine the heat conductivity of a substances used. From this result we could determine which substance it was and compare the experimental values to the theoretical.. This lab shows how materials react to heat energy inputs and how far this energy spreads along the substance relative to the energy lost, along with allowing us to calculate the thermal conductivity.
Chemical Bonding, structure and Quantity Aim To investigating a range of compound which include metallic, covalent molecular, covalent giant and ionic giant Materials used and list of apparatus Google Bunsen burner Test tube Power supply Spatula Tongs Mats Method To discover the characteristic physical properties of the substances six tests were done. These were tests of appearance, melting point, conductivity of solid, solubility in water, conductivity of solution and hardness. Test 1: Appearance. This was to note whether the substance was shiny, dull, with colour etc. Test 2: Melting point.
Aim: Magnesium with Hydrochloric Acid In this piece of coursework I will investigate to see if concentration affects the rate of reaction between Magnesium (Mg) and Hydrochloric acid (HCl). The rate of reactions using different concentrations of acid will allow me to do this. The rate of reaction involves how long it takes for the reactants to turn into products and so in this investigation we are looking at the amount of Hydrogen gas produced at different concentrations to see if concentration does affect the rate of reaction between Hydrochloric acid and Magnesium. In groups we had to carry out the reaction between the two elements to see how much Hydrogen gas was collected. Purpose of investigation: Picture 3 The purpose of this investigation was to see if concentration affects the rate of reaction between Magnesium and Hydrochloric acid.
Geothermal energy doesn’t produce pollutants and it cuts down on costs because it doesn’t need to transport the energy to the plant. (Watson, Stephanie) The term Geothermal comes from the Greek word geo (earth) and therme (heat). Geothermal naturally comes to the surface as volcanoes, hot springs, and geysers. Geothermal resources are commonly found near the plate boundaries. There are three types of geothermal power plants: dry steam plants, flash seam plants, and binary cycle plants.