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1. Determination of heat capacity of calorimeter: 50.0 mL. H2O at the initial temperature of 23.5 °C is added to a calorimeter (coffee cup) and stirred and kept for 5 minutes. Then 50.0 mL. of hot water at the temperature of 98.0 °C is added to the calorimeter contained the 50.0 mL. H2O at 23.5 °C. The temperature of the mixture is recorded every 30 second, the following data is obtained:

1. Determination of heat capacity of calorimeter: 50.0 mL. H2O at the initial temperature of 23.5 °C is added to a calorimeter (coffee cup) and stirred and kept for 5 minutes. Then 50.0 mL. of hot water at the temperature of 98.0 °C is added to the calorimeter contained the 50.0 mL. H2O at 23.5 °C. The temperature of the mixture is recorded every 30 second, the following data is obtained:

Physical Chemistry
Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter2: The First Law Of Thermodynamics
Section: Chapter Questions
Problem 2.83E: Benzoic acid, C6H5COOH, is a common standard used in bomb calorimeters, which maintain a constant...
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Hint: This is the diluted : heat capacity = 3.184 J / g °C and D = 1.00 g/ mole Heat of reaction = - (heat of solution) - heat of calorimetry c. Calculate the heat of reaction for the following chemical reaction: NaOH (s) + HC1(aq) --------→ NaC(aq) + H2O(1) Using the following reactions: NaOH(s) - -→ NaOH(aq). AH = -102 kj / mole NaOH(aq) + HCl(aq) -- calculations. -→ NaCl(aq) + H2O(1). use the heat of reaction from your - -
Transcribed Image Text:Hint: This is the diluted : heat capacity = 3.184 J / g °C and D = 1.00 g/ mole Heat of reaction = - (heat of solution) - heat of calorimetry c. Calculate the heat of reaction for the following chemical reaction: NaOH (s) + HC1(aq) --------→ NaC(aq) + H2O(1) Using the following reactions: NaOH(s) - -→ NaOH(aq). AH = -102 kj / mole NaOH(aq) + HCl(aq) -- calculations. -→ NaCl(aq) + H2O(1). use the heat of reaction from your - -
Chem. 1A : Thermochemistry 1. Determination of heat capacity of calorimeter: 50.0 mL. H2O at the initial temperature of 23.5 °C is added to a calorimeter (coffee cup) and stirred and kept for 5 minutes. Then 50.0 mL. of hot water at the temperature of 98.0 °C is added to the calorimeter contained the 50.0 mL. H2O at 23.5 °C. The temperature of the mixture is recorded every 30 second, the following data is obtained: Time in second Temperature in °C 30 55.0 60 50.0 90 45.5 120 42.0 150 38.0 180 37.5 210 37.5 240 37.0 270 37.0 300 37.0 330 37.0 D of H2O = 1.00 g/ mL. Heat capacity of H2O (1) = 4.184 J/ g °C a. Plot temperature vs. time to get the final temperature. b. Calculate the heat capacity of the calorimeter. Hint: the heat lost by hot water = heat gained by cold water + heat gained by calorimeter 2. Determination heat of reaction. 50.0 mL. of 0.100 M NaOH(aq) at the temperature of 22.0 °C is added to a calorimeter (coffee cup). Then 50.0 mL. of HCl(aq) at the temperature of 21.0 °C is added to the calorimeter containing NaOH(aq). The temperature is measured every 30 seconds , the following data is obtained: Time in second Temperature in °C 30 25.0 60 26.5 90 28.0 120 29.5 150 29.0 180 29.5 210 29.5 a. Plot temperature vs. time to get the final temperature. b. Calculate the heat of reaction in kJ/ mole
Transcribed Image Text:Chem. 1A : Thermochemistry 1. Determination of heat capacity of calorimeter: 50.0 mL. H2O at the initial temperature of 23.5 °C is added to a calorimeter (coffee cup) and stirred and kept for 5 minutes. Then 50.0 mL. of hot water at the temperature of 98.0 °C is added to the calorimeter contained the 50.0 mL. H2O at 23.5 °C. The temperature of the mixture is recorded every 30 second, the following data is obtained: Time in second Temperature in °C 30 55.0 60 50.0 90 45.5 120 42.0 150 38.0 180 37.5 210 37.5 240 37.0 270 37.0 300 37.0 330 37.0 D of H2O = 1.00 g/ mL. Heat capacity of H2O (1) = 4.184 J/ g °C a. Plot temperature vs. time to get the final temperature. b. Calculate the heat capacity of the calorimeter. Hint: the heat lost by hot water = heat gained by cold water + heat gained by calorimeter 2. Determination heat of reaction. 50.0 mL. of 0.100 M NaOH(aq) at the temperature of 22.0 °C is added to a calorimeter (coffee cup). Then 50.0 mL. of HCl(aq) at the temperature of 21.0 °C is added to the calorimeter containing NaOH(aq). The temperature is measured every 30 seconds , the following data is obtained: Time in second Temperature in °C 30 25.0 60 26.5 90 28.0 120 29.5 150 29.0 180 29.5 210 29.5 a. Plot temperature vs. time to get the final temperature. b. Calculate the heat of reaction in kJ/ mole
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