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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Question
![### Part A: Calculating ΔH_rxn
Calculate ΔH_rxn for the following reaction:
\[ 3\text{C(s)} + 4\text{H}_2\text{(g)} \rightarrow \text{C}_3\text{H}_8\text{(l)} \]
Use the following reactions and given \( \Delta H \) values:
1. \[ \text{C}_3\text{H}_8\text{(l)} + 5\text{O}_2\text{(g)} \rightarrow 3\text{CO}_2\text{(g)} + 4\text{H}_2\text{O(l)} \]
\( \Delta H = -2026.6 \text{ kJ} \)
2. \[ \text{C(s)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \]
\( \Delta H = -393.5 \text{ kJ} \)
3. \[ 2\text{H}_2\text{(g)} + \text{O}_2\text{(g)} \rightarrow 2\text{H}_2\text{O(g)} \]
\( \Delta H = -483.5 \text{ kJ} \)
**Instructions:** Express your answer to four significant figures in kilojoules.
\[ \Delta H_{\text{rxn}} = \, \text{[Input field]} \, \text{kJ} \]
(Note: A calculator tool with buttons for math symbols is displayed above the input field).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdc2240b9-73a9-42d7-ac38-1732b2e1b1a6%2Fa3341cf3-4fb3-49e9-a296-3aed60dc2cce%2Ftkvvka_processed.png&w=3840&q=75)
Transcribed Image Text:### Part A: Calculating ΔH_rxn
Calculate ΔH_rxn for the following reaction:
\[ 3\text{C(s)} + 4\text{H}_2\text{(g)} \rightarrow \text{C}_3\text{H}_8\text{(l)} \]
Use the following reactions and given \( \Delta H \) values:
1. \[ \text{C}_3\text{H}_8\text{(l)} + 5\text{O}_2\text{(g)} \rightarrow 3\text{CO}_2\text{(g)} + 4\text{H}_2\text{O(l)} \]
\( \Delta H = -2026.6 \text{ kJ} \)
2. \[ \text{C(s)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \]
\( \Delta H = -393.5 \text{ kJ} \)
3. \[ 2\text{H}_2\text{(g)} + \text{O}_2\text{(g)} \rightarrow 2\text{H}_2\text{O(g)} \]
\( \Delta H = -483.5 \text{ kJ} \)
**Instructions:** Express your answer to four significant figures in kilojoules.
\[ \Delta H_{\text{rxn}} = \, \text{[Input field]} \, \text{kJ} \]
(Note: A calculator tool with buttons for math symbols is displayed above the input field).
Expert Solution
Step 1
Given : reaction and ∆H value
Tip : applying Hess's law
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