# 04_Enthalpy_PostLab_Sum20.pdf - Enthalpy and Specific Heat...

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Enthalpy and Specific Heat Name: Ashley Frances Tam Date of Work: 06/10/2020 TOTAL: 30 points
Ashley Frances Tam Enthalpy and Specific Heat Page 2 of 9 CHM 113 POST-LAB Enthalpy and Specific Heat 1. Insert ONE picture of yourself in full PPE here ( include the cold pack ). **Remember to (1) show your full body so that we see you are wearing shoes; (2) wear your safety glasses, lab apron, and gloves; (3) cover your lower legs (socks are required, even in Arizona); (4) tie back long hair in a ponytail or a bun; (5) remove jewelry.
Ashley Frances Tam Enthalpy and Specific Heat Page 3 of 9 2. Complete Table 1 with your experimental data for the masses of the water and the unknown metal strip in Part 1 . Table 1: Mass Data Mass (g) Trial 1 Trial 2 Trial 3 Water 50.8 g 50.1 g 51.8 g Metal Strip 9.1 g 9.2 g 9.2 g 3. Complete Table 2 with your experimental data for the temperature readings of the water in your calorimeter in Part 1 , and calculate the temperature change (ΔT) for each trial. Show your work below the table and include units. ∆𝑻 = 𝑻 𝒇𝒊𝒏𝒂𝒍 − 𝑻 𝒊𝒏𝒊𝒕𝒊𝒂𝒍 Table 2: Specific Heat Data Time (minutes) Temperature (°C) Trial 1 Trial 2 Trial 3 Initial 23.4 23.3 23.6 1 minute 24.7 25.1 27.7 2 minutes 24.2 24.6 26.0 3 minutes 24.0 24.3 25.2 4 minutes 23.8 24.2 24.9 5 minutes 23.8 24.1 24.7 Δ T 0.4 0.8 1.1 Calculations of ΔT water Trial 1: 23.8 23.4 = 0.4 degrees C Trial 2: 24.1 23.3 = 0.8 degrees C Trial 3: 24.7 23.6 = 1.1 degrees C
Ashley Frances Tam Enthalpy and Specific Heat Page 4 of 9 4. Answer the following: Hint: Refer to the equations in the Introduction segment of the Procedure document. a. Calculate ΔT metal for each of the three trials. Show your work: Hint: Table 2 shows the ΔT for the water. For the ΔT of your metal, consider the initial temperature of the metal (Part 1, Step 9 in Procedure) as well as the final temperature once the calorimeter contents reached equilibrium. Calculations of ΔT water Trial 1: 23.8 23.4 = 0.4 degrees C Trial 2: 24.1 23.3 = 0.8 degrees C Trial 3: 24.7 23.6 = 1.1 degrees C