Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:**Exercise 6.128**
Use the information provided to calculate the enthalpy change involved in the complete reaction of 3.0 g of carbon to form PbCO₃(s) in reaction 4. Ensure that you provide the correct sign (positive or negative) with your answer.
**Reactions and Enthalpy Changes:**
1. \( \text{Pb(s)} + \frac{1}{2} \text{O}_2(\text{g}) \rightarrow \text{PbO(s)} \)
- \( \Delta H^\circ_{\text{rxn}} = -219 \, \text{kJ} \)
2. \( \text{C(s)} + \text{O}_2(\text{g}) \rightarrow \text{CO}_2(\text{g}) \)
- \( \Delta H^\circ_{\text{rxn}} = -394 \, \text{kJ} \)
3. \( \text{PbCO}_3(\text{s)} \rightarrow \text{PbO(s)} + \text{CO}_2(\text{g}) \)
- \( \Delta H^\circ_{\text{rxn}} = 86 \, \text{kJ} \)
4. \( \text{Pb(s)} + \text{C(s)} + \frac{3}{2} \text{O}_2(\text{g}) \rightarrow \text{PbCO}_3(\text{s)} \)
- \( \Delta H^\circ_{\text{rxn}} = ? \)
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