lab report between calorimetry spectroscopy chemiluminescence or gases

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chemistry 1211 lab

Gwinnett Technical College

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I have to write one lab report between calorimetry, spectroscopy ,chemiluminescence or gases.

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How To: Write a Formal Laboratory Report The laboratory report is a formal report of the experiment performed. The report conveys what was done in a concise, organized and easy to read fashion. It should be written in the past tense using the passive (3rd person neutral) voice. All in-lab modifications to the procedure must be noted. The following sections should be clearly labeled and contain the appropriate information in paragraph style (use of complete sentences: using correct grammar and sentence structure are required). Keep in mind, the lab report must be written so that another competent peer can reproduce the experiment and compare the results with your published results. Each laboratory report is worth a total of one hundred (100) points. Obtain the “Chemistry Lab Report Rubric” from Blackboard to be used as a guide. Each section of the laboratory report is evaluated as follows: Title Page (5 pt.): Required for submission (however please use the header function to place your name (last, first) on each page in case the title page is separated). The title page must include the following information : Title of experiment Student name (First and Last) Partners name (First and Last) Course Title and Code Instructor Name Submission Date Abstract (5 pt.): Summarizes the report. The abstract should not be longer than 250 words. The abstract contains a brief explanation of the underlying principles being explored in the study. The purpose for doing the experiment or the hypothesis is clearly stated. The key findings (results) of the experiment and major points of discussion (relating your findings to the big picture of science) are stated as well. Finally the major conclusions which were drawn from the lab are included. *NOTE: THE ABSTRACT SHOULD ALWAYS BE THE LAST SECTION ONE WRITES. IT IS A SUMMARY, WHICH CANNOT BE DONE UNTIL ALL OF THE WORK OF THE EXPERIMENT AND THE WRITING OF OTHER SECTIONS IS FINISHED.* Introduction (20 pt.): This section contains the pertinent historical and theoretical material that is relevant to the experiment. This sections should include a discussion of a current journal article* as it relates to the major focus of the lab report. Keep in mind your audience and organize your thoughts in a logical fashion. The final paragraph in this section should be a brief description of the current experiment as it pertains to the theory described. Include balanced chemical equations where applicable. If you use the course textbook, journal articles, library resources, the laboratory manual or internet sites to gather information, you MUST reference your sources at the end of your report. All references should be numbered. This section DOES NOT include procedures. Procedure (15 pt.): This section is written in the past tense, 3rd person neutral. You may reference the lab manual (handout); however you must include the actual values used in the experiments (weights, volumes etc.) along with any changes to the procedure that differed from the manual. Do not just repeat the handout with your values or verbiage. Write in your own words and be precise. Remember, you are writing this report so another student can repeat the experiment. This section DOES NOT include the result or observations, only the procedure for conducting the experiment. Data (20 pt.): This section of the report is usually dominated with figures, charts, graphs, plots and diagrams. All should be clearly labeled and sample calculations and/or formulas should be provided. Each figure should be numbered and have a figure legend briefly describing the figure. If the figure was taken from an outside source, it must be referenced properly. This section is only for data, it DOES NOT contain interpretation nor opinion. Results and Discussion (25 pt.): This is the most important section of the report and should be the bulk of the report. It demonstrates your ability to understand and interpret the data you have collected. The data presented, the observations, graphs, etc. are to be interpreted as it relates to the ideas and concepts in the introduction and compared with literature sources where necessary. Relate the experimental results to the journal article and theory discussed in the introduction. Formulate an opinion as to the relevance of this study. For example, if in theory a reaction generates a gas, do you observe bubbles? This section also addresses the yield and purity of products and possible sources of error that may have influenced these results. Be specific in these discussions. For example, do not write "possible sources of error include human error and equipment error". Error is specific to the experiment you performed and should be discussed in that context. If the yield is greater than 100% explain why. Conclusions (5 pt.): This section summarizes the main ideas and results. It connects your report to the larger world of science. Did your experiment add anything new, or justify a known principle or law? References (5 pt.): *You must use at least one peer reviewed journal article that has been published within the past 5 years. References should be numbered (labeled) according to use within the text. Refer to the Citing Reference Guide on the ChemLibGuide under the Gwinnett Technical College Library page. CHEM 1211 and CHEM 1212 Gwinnett Technical College Revised Spring 2016
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Calorimetry
Student name (First and Last)
Partners name (First and Last)
Course Title and Code
Instructor Name Submission Date

Abstract
The specific heat of most metals is always less than 0.50 J/g °C, and the heats of
neutralization of hydrochloric acid and HC2H3O2 with sodium hydroxide were expected to lie
between -57 to -58 kJ/mol H2O and -30 to -38kJ/mol of water produced. Energy is converted
from one form to another, and in an environment where two bodies have a different amount
of energy, there will be a change, and this will be recorded in the form of heat. In this case,
the heat of solution was determined using deionized water to ensure that no foreign ions are
reacting with the unknown salt which is to be established. The heat of neutralization was
performed using two different acids, a stronger and weak acid. HCl which was the stronger
acid produced more energy compared to HC2H3O2 which produced less energy due to the
partial splitting of the ions hence incomplete release of energy. Equally important, the
specific heat capacity of the metal was obtained by applying the principle of an isolated
system where heat lost by the metal is same as to that gained by the water for this case.
Finally, a conclusion was made based on the findings of conducting the experiment.

Introduction
In any given environment, the most common ways in which energy is converted is through
heat and work. Where gases are involved, the work done is zero hence all the energy changes
results to heat. This energy that flows in the surrounding can be determined by calorimetry,
which is basically a heat measurement technique. A calorimeter consists of an insulated
container, thermometer, and a mass of water as well as the system to be studied. The
insulated container helps us to increase the accuracy of the results since there will be little
heat loss in the system through the walls.
In the experiment, all the heat that is either absorbed or given off by a system (qsys) is
exchanged with its surroundings (qsur). This can be expressed mathematically as;
qsys = -qsur ……………………………….1
In this scenario, water is the environment hence the equation can be writ...


Anonymous
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