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1. Show your work for all calculations. When 1.104 grams of iron metal are mixed with 26.023 grams of hydrochloric acid in a coffee cup calorimeter, the temperature rises from 25.2 °C to a maximum of 33.5 °C. The reaction that occurs is given below 2 Fe(s) +6 HC1(aq) → 2 FeCL(aq) + 3 H, (g) (1 • Determine the amount of heat (in J) absorbed by the reaction mixture. Assume that the specific heat capacity of the mixture same as the specific heat capacity of water. How much heat (in Duac mleace

1. Show your work for all calculations. When 1.104 grams of iron metal are mixed with 26.023 grams of hydrochloric acid in a coffee cup calorimeter, the temperature rises from 25.2 °C to a maximum of 33.5 °C. The reaction that occurs is given below 2 Fe(s) +6 HC1(aq) → 2 FeCL(aq) + 3 H, (g) (1 • Determine the amount of heat (in J) absorbed by the reaction mixture. Assume that the specific heat capacity of the mixture same as the specific heat capacity of water. How much heat (in Duac mleace

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.109QP: A 21.3-mL sample of 0.977 M NaOH is mixed with 29.5 mL of 0.918 M HCl in a coffee-cup calorimeter...
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Pre-laboratory Assignment: Calorimetry and Hess’s Law

Note that the thermometer must be clamped in place using the slotted stopper and utility clamp/stand. You may also want to place the nested cups in a medium beaker for extra stability. Pre-laboratory Assignment: Calorimetry and Hess's Law 1. Show your work for all calculations. When 1.104 grams of iron metal are mixed with 26.023 grams of hydrochloric acid in a coffee cup calorimeter, the temperature rises from 25.2 °C to a maximum of 33.5 °C. The reaction that occurs is given below. 2 Fe(s) +6 HCl(aq) → 2 FeCL,(aq) + 3 H, (g) (12.12) • Determine the amount of heat (in J) absorbed by the reaction mixture. Assume that the specific heat capacity of the mixture is the same as the specific heat capacity of water. • How much heat (in J) was released by the reaction that occurred? • Is this reaction exothermic or endothermic? Is AH reaction positive or negative? • Under constant pressure conditions (as used in this experiment), the heat released by the reaction equals the reaction enthalpy, Greleased=AHrenction. Determine AHreaction in Joules per gram of metal used (J/g). • Determine AHreaction in kilojoules per mole of metal used (kJ/mol). • Determine AHreaction in kilojoules for the balanced reaction equation provided (kJ). 2. Consider the following three reactions: 2 Fe(s) +6 HC1(aq) → 2 FeCL (aq) +3 H, (g) Fe,0,(s)+6 HCl(aq) 2 FeCl, (aq) +3 H,O(1) AHA (12.13) - AHB (12.14) 2 H, (g) + 0,(g) –→ 2 H,O(1) 12.15) Show how these equations must be summed together according to Hess's Law to determine AH for the combustion of iron (target equation shown below). Also show clearly how the AH values of each of the three reactions must be manipulated to determine the enthalpy of combustion of iron. 4 Fe(s) +30,(g)→ 2 Fe,O, (s) 3. Using tabulated AH values in the text, determine the enthalpy change (in kJ) that occurs during the formation of water from its AH-? (12.16) elements: 2 H, (g) + 0, (g) - 2 H,O(1) (12.17) AH=? Note that this value (and the equation) will be used in your data analysis for this lab.
Transcribed Image Text:Note that the thermometer must be clamped in place using the slotted stopper and utility clamp/stand. You may also want to place the nested cups in a medium beaker for extra stability. Pre-laboratory Assignment: Calorimetry and Hess's Law 1. Show your work for all calculations. When 1.104 grams of iron metal are mixed with 26.023 grams of hydrochloric acid in a coffee cup calorimeter, the temperature rises from 25.2 °C to a maximum of 33.5 °C. The reaction that occurs is given below. 2 Fe(s) +6 HCl(aq) → 2 FeCL,(aq) + 3 H, (g) (12.12) • Determine the amount of heat (in J) absorbed by the reaction mixture. Assume that the specific heat capacity of the mixture is the same as the specific heat capacity of water. • How much heat (in J) was released by the reaction that occurred? • Is this reaction exothermic or endothermic? Is AH reaction positive or negative? • Under constant pressure conditions (as used in this experiment), the heat released by the reaction equals the reaction enthalpy, Greleased=AHrenction. Determine AHreaction in Joules per gram of metal used (J/g). • Determine AHreaction in kilojoules per mole of metal used (kJ/mol). • Determine AHreaction in kilojoules for the balanced reaction equation provided (kJ). 2. Consider the following three reactions: 2 Fe(s) +6 HC1(aq) → 2 FeCL (aq) +3 H, (g) Fe,0,(s)+6 HCl(aq) 2 FeCl, (aq) +3 H,O(1) AHA (12.13) - AHB (12.14) 2 H, (g) + 0,(g) –→ 2 H,O(1) 12.15) Show how these equations must be summed together according to Hess's Law to determine AH for the combustion of iron (target equation shown below). Also show clearly how the AH values of each of the three reactions must be manipulated to determine the enthalpy of combustion of iron. 4 Fe(s) +30,(g)→ 2 Fe,O, (s) 3. Using tabulated AH values in the text, determine the enthalpy change (in kJ) that occurs during the formation of water from its AH-? (12.16) elements: 2 H, (g) + 0, (g) - 2 H,O(1) (12.17) AH=? Note that this value (and the equation) will be used in your data analysis for this lab.
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