Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![**Title: Calculating Average Molar Bond Enthalpy**
**Introduction**
In this exercise, you will learn how to calculate the average molar bond enthalpy of the carbon-bromine bond in a CBr₄ molecule using given enthalpy values.
**Given Data**
- ΔHf [Br(g)] = 111.9 kJ·mol⁻¹
- ΔHf [C(g)] = 716.7 kJ·mol⁻¹
- ΔHf [CBr₄(g)] = 29.4 kJ·mol⁻¹
**Objective**
Calculate the average molar bond enthalpy of the carbon-bromine (C–Br) bond in a CBr₄ molecule.
**Procedure**
1. Use the given data and the formula for calculating bond enthalpy using the enthalpies of formation.
2. Apply the relationship involving the enthalpies of formation to solve for ΔH_{C–Br}.
**Calculation Area**
ΔH_{C–Br} = [Calculation Placeholder]
**Conclusion**
Complete the calculation to find the average molar bond enthalpy of the C–Br bond. This exercise illustrates the use of thermochemical data in bond enthalpy calculations.
**Note:**
Ensure accuracy in your calculations and refer to any standard tables if necessary.](https://content.bartleby.com/qna-images/question/6dbc0877-d53f-4c9c-9eec-5fc7749c806c/635276a2-2ce5-45cb-9601-4e2479835a5d/zi5t4kw_processed.jpeg)
Transcribed Image Text:**Title: Calculating Average Molar Bond Enthalpy**
**Introduction**
In this exercise, you will learn how to calculate the average molar bond enthalpy of the carbon-bromine bond in a CBr₄ molecule using given enthalpy values.
**Given Data**
- ΔHf [Br(g)] = 111.9 kJ·mol⁻¹
- ΔHf [C(g)] = 716.7 kJ·mol⁻¹
- ΔHf [CBr₄(g)] = 29.4 kJ·mol⁻¹
**Objective**
Calculate the average molar bond enthalpy of the carbon-bromine (C–Br) bond in a CBr₄ molecule.
**Procedure**
1. Use the given data and the formula for calculating bond enthalpy using the enthalpies of formation.
2. Apply the relationship involving the enthalpies of formation to solve for ΔH_{C–Br}.
**Calculation Area**
ΔH_{C–Br} = [Calculation Placeholder]
**Conclusion**
Complete the calculation to find the average molar bond enthalpy of the C–Br bond. This exercise illustrates the use of thermochemical data in bond enthalpy calculations.
**Note:**
Ensure accuracy in your calculations and refer to any standard tables if necessary.
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