--- **Chemical Reaction and Thermodynamics** Consider the following reaction: \[ \text{Na(s)} + \frac{1}{2} \text{Br}_2(\text{g}) \rightarrow \text{NaBr(s)} \quad \Delta H = -367 \, \text{kJ/mol} \] Given Data: - Lattice energy of \(\text{NaBr(s)} = -742 \, \text{kJ/mol}\) - Ionization energy of \(\text{Na(g)} = 495 \, \text{kJ/mol}\) - Bond energy of \(\text{Br}_2(\text{g)} = 193 \, \text{kJ/mol}\) - Electron affinity of \(\text{Br(g)} = -325 \, \text{kJ/mol}\) **Objective:** Use these data to determine the heat of sublimation of \(\text{Na(s)}\). \[ \Delta H_{\text{sub}} = \underline{\qquad\qquad} \, \text{kJ} \] --- *Note:* The problem requires the application of Hess's Law or a Born-Haber cycle to solve for the sublimation enthalpy \(\Delta H_{\text{sub}}\) of sodium (\(\text{Na}\)).
--- **Chemical Reaction and Thermodynamics** Consider the following reaction: \[ \text{Na(s)} + \frac{1}{2} \text{Br}_2(\text{g}) \rightarrow \text{NaBr(s)} \quad \Delta H = -367 \, \text{kJ/mol} \] Given Data: - Lattice energy of \(\text{NaBr(s)} = -742 \, \text{kJ/mol}\) - Ionization energy of \(\text{Na(g)} = 495 \, \text{kJ/mol}\) - Bond energy of \(\text{Br}_2(\text{g)} = 193 \, \text{kJ/mol}\) - Electron affinity of \(\text{Br(g)} = -325 \, \text{kJ/mol}\) **Objective:** Use these data to determine the heat of sublimation of \(\text{Na(s)}\). \[ \Delta H_{\text{sub}} = \underline{\qquad\qquad} \, \text{kJ} \] --- *Note:* The problem requires the application of Hess's Law or a Born-Haber cycle to solve for the sublimation enthalpy \(\Delta H_{\text{sub}}\) of sodium (\(\text{Na}\)).
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![---
**Chemical Reaction and Thermodynamics**
Consider the following reaction:
\[ \text{Na(s)} + \frac{1}{2} \text{Br}_2(\text{g}) \rightarrow \text{NaBr(s)} \quad \Delta H = -367 \, \text{kJ/mol} \]
Given Data:
- Lattice energy of \(\text{NaBr(s)} = -742 \, \text{kJ/mol}\)
- Ionization energy of \(\text{Na(g)} = 495 \, \text{kJ/mol}\)
- Bond energy of \(\text{Br}_2(\text{g)} = 193 \, \text{kJ/mol}\)
- Electron affinity of \(\text{Br(g)} = -325 \, \text{kJ/mol}\)
**Objective:**
Use these data to determine the heat of sublimation of \(\text{Na(s)}\).
\[
\Delta H_{\text{sub}} = \underline{\qquad\qquad} \, \text{kJ}
\]
---
*Note:* The problem requires the application of Hess's Law or a Born-Haber cycle to solve for the sublimation enthalpy \(\Delta H_{\text{sub}}\) of sodium (\(\text{Na}\)).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbd4b3d86-96dd-42d9-adfb-2b83ce1331b6%2F7d20ad0b-4760-4284-86bb-8b900ae5ca59%2Fydraugp.jpeg&w=3840&q=75)
Transcribed Image Text:---
**Chemical Reaction and Thermodynamics**
Consider the following reaction:
\[ \text{Na(s)} + \frac{1}{2} \text{Br}_2(\text{g}) \rightarrow \text{NaBr(s)} \quad \Delta H = -367 \, \text{kJ/mol} \]
Given Data:
- Lattice energy of \(\text{NaBr(s)} = -742 \, \text{kJ/mol}\)
- Ionization energy of \(\text{Na(g)} = 495 \, \text{kJ/mol}\)
- Bond energy of \(\text{Br}_2(\text{g)} = 193 \, \text{kJ/mol}\)
- Electron affinity of \(\text{Br(g)} = -325 \, \text{kJ/mol}\)
**Objective:**
Use these data to determine the heat of sublimation of \(\text{Na(s)}\).
\[
\Delta H_{\text{sub}} = \underline{\qquad\qquad} \, \text{kJ}
\]
---
*Note:* The problem requires the application of Hess's Law or a Born-Haber cycle to solve for the sublimation enthalpy \(\Delta H_{\text{sub}}\) of sodium (\(\text{Na}\)).
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