Experiment2LiamCharron - Student Name Liam Charron Student...

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Student Name: Liam Charron Student Number: 8199291 Par tner’s Name and Student #: Andrew Daszczynski 8325724 Demonstrator's Name: Curtis Walton PLEASE NOTE: If ANY of the above information is UNCLEAR or not provided, your grade will NOT be recorded!! Lab Day (circle): Tues aft Tues night Wed Thurs aft Thurs night Fri Lab Week (circle): 1 2 Laboratory Report Cover Page Experiment 2. Enthalpy of Various Reactions Checklist: o Raw Data Sheet written in pen, signed by TA and attached o 8 curves [2 for metal; 2 for acid 1; 2 for acid 2; 2 for salt] attached o Completed formal report typed and attached Student’s Initials L.C
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Enthalpy of Various Reactions Liam Peter Charron University of Ottawa CHM1311 Lab #2 October 6, 2015
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Introduction: This report details the experimentally obtained enthalpy of various types of reactions, specifically the enthalpy of a neutralization (acid+base) reaction as well as a dissolution (salt into water) reaction. There are also calculations associated with finding the experimental molar mass of a metal using the Dulong-Petit Law. Using a known metal (Zinc), as well as the data recorded on the Vernier Labquest device and subsequently analyzed in the Logger Pro program, the molar mass and specific heat capacity will be experimentally obtained. Regarding the neutralization reaction, further data from the Vernier Labquest device will be analyzed in order to determine the approximate energy released in the reaction. Combining the data of the reaction energy with the number of moles of water will result in the acquisition of a Heat of Neutralization value, which we can compare with the literature value obtained from Enthalpy_Change_of_Neutralization , which is approximately -57 kJ/mol. Calculations with both acids are expected to replicate that theoretical result. The dissolution of salt reaction involves an unknown salt, whose only information given is molar mass and specific heat capacity. Using calorimetric formulas, the enthalpy of dissolution will be experimentally obtained and compared with a literature value. The result is expected to once again replicate the literature value with a slight margin of error and, optimistically, a sub-10% error value. Procedure: As detailed in the lab manual. Graphs:
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Tables: Part A: Specific Heat Capacity of a Metal LabQuest Run 1 LabQuest Run 2 Trial 1 Trial 2 Metal Zinc Zinc Mass (g) 12.48 12.40 Mass of foam cup (g) 1.85 1.85 Volume of water in cup (ml) 20 20 Mass of cup + water (g) 20.68 20.90 Temp. of boiling water (°C) 100 100 Part B: Enthalpy of Neutralization Run 3 Run 4 Run 5 Run 6 Acid used HCl HCl HNO 3 HNO 3 Volume (ml) 40 40 40 40 Concentration (mol/L) 1.1 1.1 1.1 1.1 Mass of cup + NaOH + acid (g) 82.03 80.97 83.07 80.99 Part C: Enthalpy of Solution Run 7 Run 8 Trial 1 Trial 2 Salt A A Mass (g) 1.499 1.511 Mass of cup + water (g) 20.68 20.90 Mass of cup + water + salt (g) 22.11 21.88 Observations: Part A: Specific Heat Capacity: -The zinc was brought to equilibrium with boiling water at 100°C.
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