Wireless Temperature Probe USB Port Chromebook Scale 10 M HCl Solution Sodium

Wireless temperature probe usb port chromebook scale

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Wireless Temperature Probe USB Port Chromebook Scale 1.0 M HCl Solution Sodium Hydroxide Pellets Magnesium Oxide Magnesium Metal 2 beakers (400mL) 2 graduated cylinders (100mL and 50mL) scoopula Procedure: Part 1:The Enthalpy of the NaOH was Found 1. The NaOH was measured out. 2. Water was poured into the calorimeter and the initial temperature was recorded. 3. The measured amount of NaOH was put into the calorimeter. 4. The lid was placed over the calorimeter. 5. The temperature probe was placed into the calorimeter and the final temperature was recorded 6. Steps 1-5 were repeated for each different trial Part 2: The Enthalpy of the Reaction Between Mg and O2 was Found Equation 1 1. The Mg metal was measured out and the mass was recorded 2. The HCl was measured out and the amount was recorded 3. The temperature probe was used to record the initial temperature of the HCl 4. The HCl was transferred to the calorimeter and the Mg was added to the HCl 5. A lid was placed on the calorimeter 6. The temperature probe was placed into the calorimeter and the final temperature of the solution was recorded Equation 2 1. The MgO was measured out and the mass was recorded 2. The HCl was measured out and the ml was recorded 3. The temperature probe was used to find the initial temperature of the HCl 4. The HCl was transferred to the calorimeter and the MgO was added to the HCl
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3 Phan Piedmont Hills High School – AP Chemistry 2017-2018 Phan, Madalyn Period Laboratory Experiment 4: Calorimeter Lab 5. The lid was placed on the calorimeter 6. The temperature probe was placed into the calorimeter and the final temperature of the solution was recorded Data: Part 1: Dissolution of NaOH Trial Amount of NaOH (g) Initial Temp. ( ) Final Temp. ( ) ΔT ( ) Amount of water (mL) Enthalpy 1 1.876 22.2 26.3 4.10 100 -36.6 kJ 2 2.994 21.1 28.0 6.90 100 -38.6 kJ 3 4.959 21.2 33.4 12.2 100 -41.2 kJ Average Enthalpy: -38.8 kJ Part 2: The reaction of Mg wi th O2 Equation Amount of Mg (and MgO)(g) Amount of HCl (mL) Initial Temp ( ) Final Temp ( ) ΔT ( ) Enthalpy Mg (s) + 2HCl (aq) MgCl2(aq) + H2(g) 2.003 164 21.4 56.4 35.0 -437 kJ MgO(s) + 2HCl(aq) MgCl2(aq) + H2O(l) 2.000 100 21.8 34.2 12.4 -105 kJ Calculations: Part 1: Trial 1: ΔH = = 1715.44 J 00 g H O .184 1 2 • 4 J g C ° O H 2 .1 • 4 ° C )( ) = 0.04690 mol NaOH ( 1 1.876 g NaOH 1 mol NaOH 39.998 g NaOH
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4 Phan Piedmont Hills High School – AP Chemistry 2017-2018 Phan, Madalyn Period Laboratory Experiment 4: Calorimeter Lab = → 1715.44 = 0.04690x → x = -36.6 kJ 1715.44 J 0.04690 mol x J 1 mol Trial 2: ΔH = = 2886.96 J 00 g H O .184 1 2 • 4 J g C ° O H 2 .9 • 6 ° C )( ) = 0.07485 mol NaOH ( 1 2.994 g NaOH 1 mol NaOH 39.998 g NaOH = → 2886.96 = 0.07485x → x = 38.6 kJ
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