Balance the ethanol combustion reaction shown below and use the bond energies to estimate the enthalpy change for the combustion of 2.07 moles of ethanol. C2H;OH(1) + O2(9) → CO2(9) + H»0(g) Table of bond enthalpies is in the Equation Sheet. ΔΗ kJ
Balance the ethanol combustion reaction shown below and use the bond energies to estimate the enthalpy change for the combustion of 2.07 moles of ethanol. C2H;OH(1) + O2(9) → CO2(9) + H»0(g) Table of bond enthalpies is in the Equation Sheet. ΔΗ kJ
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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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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### Homework Assignment: Enthalpy Calculations
#### Question 2:
**Balance the ethanol combustion reaction shown below and use the bond energies to estimate the enthalpy change for the combustion of 2.07 moles of ethanol.**
\[ \text{C}_2\text{H}_5\text{OH}(l) + \text{O}_2(g) \rightarrow \text{CO}_2(g) + \text{H}_2\text{O}(g) \]
**Table of bond enthalpies is in the** Equation Sheet.
**ΔH**:
\[ \_\_\_\_\_\_\_\_ \text{kJ} \]
**Instructions:**
1. Balance the chemical equation.
2. Write out the Lewis structure for each compound.
3. Account for each bond broken and each bond formed.
**Feedback:**
Incorrect. After you balance the chemical equation, write out the Lewis structure for each compound. It is important to account for each bond broken and each bond formed. Also, keep in mind that the bond energies on the table refer to a whole mole of bond broken or formed.
---
#### Question 3: Calculate the Enthalpy of the Photosynthesis Reaction
**Balance the reaction shown below that occurs during photosynthesis and use bond energies to estimate the enthalpy change for the reaction that produces 1.86 moles of glucose:**
\[ \text{CO}_2(g) + \text{H}_2\text{O}(g) \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + \text{O}_2(g) \]
**Table of bond enthalpies is in the** Equation Sheet. **Look up the structure for the ring form of glucose (not the linear form).**
**ΔH**:
\[ \_\_\_\_\_\_\_\_ \text{kJ} \]
**Instructions:**
1. Balance the chemical equation.
2. Write out the Lewis structure for each compound.
3. Account for each bond broken and each bond formed.
**Feedback:**
Incorrect. After you balance the chemical equation, write out the Lewis structure for each compound. It is important to account for each bond broken and each bond formed. Also, keep in mind that the bond energies on the table refer to a whole mole of bond broken or formed.
---
**Note:** For both questions, detailed](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb9549e9c-0203-4301-931b-72d8fb130251%2Fba979db0-ffea-4af9-97d1-d732a930a3e5%2Fbsp25z.jpeg&w=3840&q=75)
Transcribed Image Text:---
### Homework Assignment: Enthalpy Calculations
#### Question 2:
**Balance the ethanol combustion reaction shown below and use the bond energies to estimate the enthalpy change for the combustion of 2.07 moles of ethanol.**
\[ \text{C}_2\text{H}_5\text{OH}(l) + \text{O}_2(g) \rightarrow \text{CO}_2(g) + \text{H}_2\text{O}(g) \]
**Table of bond enthalpies is in the** Equation Sheet.
**ΔH**:
\[ \_\_\_\_\_\_\_\_ \text{kJ} \]
**Instructions:**
1. Balance the chemical equation.
2. Write out the Lewis structure for each compound.
3. Account for each bond broken and each bond formed.
**Feedback:**
Incorrect. After you balance the chemical equation, write out the Lewis structure for each compound. It is important to account for each bond broken and each bond formed. Also, keep in mind that the bond energies on the table refer to a whole mole of bond broken or formed.
---
#### Question 3: Calculate the Enthalpy of the Photosynthesis Reaction
**Balance the reaction shown below that occurs during photosynthesis and use bond energies to estimate the enthalpy change for the reaction that produces 1.86 moles of glucose:**
\[ \text{CO}_2(g) + \text{H}_2\text{O}(g) \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + \text{O}_2(g) \]
**Table of bond enthalpies is in the** Equation Sheet. **Look up the structure for the ring form of glucose (not the linear form).**
**ΔH**:
\[ \_\_\_\_\_\_\_\_ \text{kJ} \]
**Instructions:**
1. Balance the chemical equation.
2. Write out the Lewis structure for each compound.
3. Account for each bond broken and each bond formed.
**Feedback:**
Incorrect. After you balance the chemical equation, write out the Lewis structure for each compound. It is important to account for each bond broken and each bond formed. Also, keep in mind that the bond energies on the table refer to a whole mole of bond broken or formed.
---
**Note:** For both questions, detailed
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