Lab: Latent Heat Of Vaporisation Paper

524 words - 3 pages

Aim: To investigate the Latent Heat of Vaporisation of water. Independent Variables: voltage / energy Dependent Variables: temperatureControlled Variables: amount of water, voltage and currentWe won't consider uncertainties here since it is a planning lab.Hypotheses:The water will heat up at a quicker rate if a lot of energy is added instead of a small amount of energy. Due to the fact that the more energy one applies to the immersion heater, the more heat it will release into the water, increasing its temperature.To find the Latent Heat of vaporisation we need to rearrange this equation:∆m depends on ...view middle of the document...

Mix significantly until the change becomes insignificant. Measure the mass of the water (total mass - mass of empty beaker). Read of voltmeter and ammeter, readings should stay constant. Do NOT add additional energy at any point during the experiment. Leave the beaker on the scale, since we are going to read off the mass of the water every 2 minutes to be able to graph ∆m vs t with fewer uncertainties. The closer the time interval, the smaller the uncertainties.iii) Start the time as soon as the water starts to boil at a constant rate (temperature is not rising any more, bubbles rising at a constant rate). Let the experiment continue for approx. 30 min. to get enough raw data. At the end of the experiment, remember to stop the time and measure the final mass of the water. Try to keep room temp. as constant as possible during the experiment (close all windows and doors to prevent draughts). By preventing temperature change in the surroundings, we prevent larger manipulation of the data by the room temp.iv) Present your data in a graph of ∆m vs t, and then draw the line of best fit. As we want to find and we know that and the gradient of the graph represents we then know that which is the same as we take the gradient out of the graph and then re-arrange the equation so that we get :Having the gradient and having V and I which are constant we can finally find the Latent Heat of Vaporization by re-arranging the equation and solve for as shown in the graph.


Heat of Combustion of Solid Magnesium using Hydrochloric Acid and Magnesium Oxide in a calorimeter. - AP Chemistry - Lab report

634 words - 3 pages Free Heat of Combustion: Magnesium In this experiment, you will use Hess’s law as you determine a heat of a reaction that would be difficult to obtain by direct measurement—the heat of combustion of magnesium ribbon. The reaction is represented by the equation: Mg(s) + 1/2 O​2​(g) → MgO(s) This is the target equation. This equation can be obtained by combining equations (1), (2), and (3): (1) MgO(s) + 2 HCl(aq) → MgCl​2​(aq) + H​2​O(l) (2

Paper On The Man The Myth

426 words - 2 pages Richard KazmiMr.HickeyChemistry3/19/13Calorimetry Lab ReportPurpose: Calorimetry is the measurement of the heat flow into or out of a system for chemical and physical purposes. The purpose of this lab was to use calorimetry to find how much heat is absorbed or released when NaCl is dissolved in water. In this case, we will find the heat coming out of the system, in a chemical process.Hypothesis: Once the sodium chloride is put into the water

Calorimetry lab - Abstract and Prelab - Chemistry - Assignment

895 words - 4 pages NFHS – Chem I - HONORS Calorimetry Lab – Specific Heat of a Metal Calorimetry Lab – Specific Heat of a Metal Abstract Chemists can identify substances on the basis of their chemical and physical properties. One unique physical property of a substance is the amount of energy it will absorb per unit of mass. This property can be measured quite accurately and is called specific heat (Cp). Specific heat is the amount of energy measured in joules

Thermochemistry - General Chemistry UNH - General Chemistry UNH - Assigment

3683 words - 15 pages CHEM 403 Fall 2018 1 Thermochemistry Goals and Challenges: The following experiments concern heat: heat flow, heat production and the relationship with bond breaking and bond making. In Part I, you will study heats of dissolution; in Part II, you will model the relationship between heat and bond breaking and making and will then determine the heat of combustion of methanol via calorimetry. Bring to lab:  Lab notebook  Safety eyewear, lab

In Specific, The Mass Of A Volatile Unknown Liquid Was Discovered With The Use Of The Calorimeter

1015 words - 5 pages This is a standardized lab write up for an American Advanced Placement Chem class dealing with the use of a calorimeter. In specific, the mass of a volatile unknown liquid was discovered with the use of the calorimeter.Experiment Eleven - Heat Effects and CalorimetryIn this lab, molar mass of a volatile liquid was determined through the use of a calorimeter The lab validates the equation Q=S.H * M * T, by using the known or calculable values of

Paper On Hurricanes

342 words - 2 pages ocean air, which results in more precipitation.Atmospheric RequirementsIn order for a hurricane to form it needs lots of latent heat that is liberated when huge quantities of water vapor condense. Hurricanes can only form over warm water and they must have a lot of a large quantity of moister-laden air to start and to keep going.

Environmental Science EVR1001 Lab Report - EVR1001 - Lab Report

869 words - 4 pages EVR1001L-0001 Fall 2017 Lab 8: Green Building Lab Report Gianna Stern April 29, 2018 Methods (15 points): To start this lab, the experimenter traveled to a cul-de-sac in a neighborhood full of houses. The purpose of this lab is to enter a vacant house, explore the insides, scan the living areas for opportunities to improve environmental friendliness, in other words, make it more “green.” Firstly, the experimenter had to find a vacant house and

Unknown report: Streptococci vs Staphlococci - SFSU microbiology - research paper

1529 words - 7 pages Kaylee Kelley 211.3 5/16/17 Unknown Report Bio 211 The study of microbiology requires not only an academic understanding of the microscopic world but also a practical understanding of lab techniques and procedures in order to to identify and control microorganisms(MOs). The proper identification of a microorganism is not only important in a microbiology lab but also in the medical, industrial, and pharmaceutical fields. In this lab report, lab

Smart Grid and Demand Side management - University - Essay

2106 words - 9 pages ) rp Pressure ratio RT Refrigeration tons S Entropy (kJ/kg K) T Temperature (�C) W Power (kW) � quality vapour Abbreviations and subscript g gases GT gas turbine HP high-pressure steam in input l liquid phase LP low-pressure steam MP medium-pressure steam MRA absorption chiller out output PC power cycle SG steam generator ST steam turbine v vapour phase 0 standard state m mixture Greeks l Latent heat (kJ/kg) � Efficiency (%) Using anMRAwith a water

Experiment 38 Pre - Lab notes and agenda - University of Texas Rio Grande Valley - Pre-Lab explanation on the process.

537 words - 3 pages first two flame tests. THE FOLLOWING PROCEDURE SHOULD BE DONE FOR BOTH REFERENCE AND THEN UNKNOWN. TEST TUBES SHOULD BE HELD WITH TEST TUBE CLAMPS TO AVOID ACCIDENTAL SPILLING OF CHEMICALS ON STUDENTS WHILE HOLDING TEST TUBES. Part C – Fume Hood Preparing Sample ➢ 5 mL in a 100mL beaker on a wire gauze with Bunsen burner under and heat until moist residue (condensation starts) DON’T LET IT EVAPORATE COMPLETELY. Add 1-2 mL of D.I. Water Confirmatory

biology the longer the catlase the better the reaction - 9t sydney girls highschool - research paer

1126 words - 5 pages bubbles and heat within the test tube. The higher the efficiency and activity levels of the catalase within the liver the more heat produced in the test tube catalase and h2o2 are directly proportional to one another. Theoretically, enzyme catalase should be most active at internal body temperatures, as internal body temperature is their biological habitat. This reaction equation can be represented as 2H202 2H20 + O2 * the arrow

A research paper on the STD Syphilis - Marywood - Research Paper

2848 words - 12 pages years, it has increased due men to men interaction. Treponema pallidum has a corkscrew shaped (spirochete), it also thrives in the waterest part of the body and it will survive and reproduce only where there is little of the oxygen is present. It would be killed by heat or dry temperature. Therefore a individual can not just simple contracted syphilis from a toilet seat, used bath towels, or even a bed. T.P has a similar structure such as gram

Scientific Theories: This essay describes the findings between David Keeling and Gilbert Plass. - Earth Science - Essay

499 words - 2 pages Keeling was one of them and had been measuring carbon dioxide levels in various areas of the country. While working on this project, he decided against working in a chemistry lab in favor of working in an emerging field called “Geochemistry”. His study was conducted from May until September of 1955 spending most of his time collecting carbon dioxide samples while on a camping trip. However, they ran into a problem with a hungry deer. That night

lab safety for 11th grade earth and space - science - instructions

3535 words - 15 pages lenses, notify your teacher. 2. Wear a lab apron or coat whenever you work with corrosive chemicals or substances that can stain. 3. Remove or tie back any article of clothing or jewelry that can hang down and touch chemicals, flames, or equipment. Roll up or secure long sleeves. Never wear open shoes or sandals. General Precautions 4. Read all directions for an experiment several times before beginning the activity. Carefully follow all written

Molar Mass of a Volatile Liquid - CHM 111 - Formal Lab Report

1039 words - 5 pages determine the quantity of gas under given conditions of pressure, volume, and temperature. In this experiment, an unknown volatile liquid is heated in a boiling water bath and is vaporized. The vapor forces air from the flask through a tiny pin-hole in the foil cover, until the pressure within the flask equals the barometric pressure of the lab. As with all gases the vapor occupies the entire volume of its container. The temperature of the vapor