# 07_Enthalpy_PostLab-1.pdf - Enthalpy and Specific Heat...

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Enthalpy and Specific HeatRoberto Flores 10/07/2019TOTAL: 20 points
Roberto Flores Enthalpy and Specific Heat Page 2 of 8 CHM 113 POST-LAB Enthalpy and Specific Heat 1. Insert ONE picture of yourself in full PPE here (include the packet of hand warmer). **Remember to (1) show your full body so that we see you are wearing shoes; (2) wear your safety glasses, lab coat, and gloves; (3) cover your lower legs (socks are not optional, even in Arizona); (4) tie back long hair in a ponytail or a bun; (5) remove jewelry.
Roberto Flores Enthalpy and Specific Heat Page 3 of 8 2. Completethe following table 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 1Trial 2 Trial 3 Water 45.8g 47.7g 46.5g Metal Strip 20.7g 19.3g 20.2g 3. Complete the following table with your experimental data for the temperature changes for 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?𝒊?𝒂?− 𝑻𝒊?𝒊𝒕𝒊𝒂?Table 2: Specific Heat Data Time (minutes) Temperature (°C) Trial 1 Trial 2 Trial 3 Initial 20.7 20.2 19.9 1 minute 21.8 22.1 21.9 2 minutes 21.9 22.2 22.0 3 minutes 22.3 22.2 22.3 4 minutes 22.4 22.5 22.4 5 minutes 22.0 22.5 22.4 ΔT 1.3 2.3 2.5 Calculations of ΔTTrial 1: 22.0-20.7=1.3 Trial 2: 22.5-20.2=2.3 Trial 3: 22.4-19.9=2.5
Roberto Flores Enthalpy and Specific Heat Page 4 of 8 4. Calculatethe specific heat (C or Cs) of the unknown metal strip for each trial here. What is the average specific heat for all three trials?