Specific Heat Lab Report

The observed emission data for the different elements did not look how they were supposed to. However the “peaks” for Hydrogen were found to be 534.52 and 631.24, 534.70 and 569.11 for Helium and 529.73 and 630.71 for Mercury. The Rydberg’s Constant found to 1.1x107 8.5x104 while the known constant is 10967758.34m-1. The percent error of 0.29% and the accuracy of this reading is 99.7. The slope and intercept of the linear regression line is -0.01 3.3x10-5 and 0.02x10-1 1.9x10-6 respectfully.

A milk-based, litmus broth tube is incubated and observed after 48 hours. Observations include lactose fermentation without gas as well as with gas, the reduction of litmus, casein protein coagulation and casein and protein hydrolysis. These characteristics were all determined based on the color of the solution and the production of a curd, the curds density and the production of a gas. To determine the density of the curd, the tube was slightly turned to see rather or not it was mobile or concentrated towards the bottom.

Molar mass is the mass of 6.022 x 1023 atoms. M of compounds is the sum of the elements that the compound is made up of.

It was evident throughout the experiment that in the compound the metal determined the color of the flame. The color depended only on the metal component of the compound. The non-metal element that was in the compound did not mater. Compounds with Lithium (Li) were always red, compounds with Sodium (Na) were always yellow, compounds with Calcium (Ca) were always orange, Compounds with potassium (K) were always lilac, and compounds with Copper (Cu) were green. Going down the group there would be higher energy, which is shown through the visible color of the flame produced. It is shown in the graph how the energy of each wavelength in photon increases going down the group. For example, the metal Li shown in the graph has 2.84 *10-19 J energy and is located near the top of group 1, which is a lower energy level comparing to the energy of K which is 4.68*10-19 J. and is located in the middle of group 1, and had a higher energy level. Another relationship shown in the graph is that going to the right of a period metals decrease energy. This is shown with K, which has 4.68*10-19 J of energy and Ca, which has 3.43*10-19

Heat is the form of energy, thermal energy, which flows between two substances due to their difference in temperature.1 The measurement of heat flow is called Calorimetry and the apparatus used to measure the heat flow (temperature change) for a reacting system is called a calorimeter. The calorimeter is well-insulated device that help to minimize the heat exchange between the system being observed and its surroundings.

I had gotten a call on Monday at around 4:00 in the morning to come in at the large firm as a dead body had been found in the building. I reached at the large firm at 5:00 AM and found police cars, ambulances, and fire trucks at the scene. A few of my colleagues had come up to me to give me the information from the cleaning crew who had found the dead body. I asked the coroner to measure the body’s temperature and he told me it was currently 88.2oF. I decided to wait an hour to see the decrease in the body’s temperature. Until then I decided to search for more evidence. One of the cleaners told me the building stays at a constant temperature of 67oF. At 6:00 AM, the coroner measured the body’s temperature and it had decreased 1.5 degrees. The body’s temperature was

For all three trails the H202 solution in water increase by 10˚C in terms of before and after yeast is added.

This project used four different exothermic reactions to boil one litre of water, in doing this the reactions’ economic and environmental friendliness were tested and compared. The following exothermic reactions were tested: the combustion of charcoal, the combustion of wood, the combustion of propane gas and the combustion of hydrogen gas. It is important to note that we did as much as possible to carry out all the experiments fairly, however we faced a few difficulties and were not able to complete the hydrogen combustion experiment due to a lack of equipment and a safe environment in which to carry out the experiment. However we can be sure of the outcome (had we continued with the experiment) due to research and the help of Brendon Duke (the Business

Not all enthalpy changes of reaction can be measured directly by using calorimetry and hence Hess’s Law can be used to determine the enthalpy changes that cannot be determined by direct measurements.

(Data of 1st trial + Data of 2nd trial + Data of 3rd trial) / 3 = Average

Thermal imaging amends overtness of the objects in a dark environment by identifying the objects infrared radiation and then engendering an image predicated on temperature information. Near infrared illumination, low light imaging is withal most commonly used night vision technologies. Contrary to these two methods thermal imaging works in environments without any light. Thermal imaging can also penetrate obscurants such as smoke, fog and haze.

In order to measure a temperature, thermal equilibrium much be reached between the thermometer as a whole, the mercury inside the thermometer, and the substance being measured. This, in turn, results in being able to accurately tell what the temperature of the substance is.

Calorimetry is the science that was first recognized by a Scottish physician and the scientist Joseph Black. It is related with determining the variation in energy of a system by measuring the heat transfer with the surrounding. It is derived from the word calor in Latin, which means the heat and the pressure. Calorimeter is the device used in the calorimetry science to measure the quantity of heat transported from or to an object. Heat is the transfer of thermal energy between two bodies that differs in temperature (Mc Graw Hill Education). Calorimeter helped many generations to measure the quantity of heat using different types of devices; also they followed a specific procedure and equations to find out quantitative

{The values are rounded up to have 3 sig figs since the numbers that are presented in the information/introduction has 3 sig figs. (Except for the sample values below)}

flask of metal with a vacuum between the two walls to prevent the transfer of heat.