3. The illustration below graphs energy during the formation of a covalent bond. Where can you identify an endothermic reaction? 2H,0, + 2H0 Swew Aluan when bonds are broken when new bonds are formed before the reaction throughout the whole process
3. The illustration below graphs energy during the formation of a covalent bond. Where can you identify an endothermic reaction? 2H,0, + 2H0 Swew Aluan when bonds are broken when new bonds are formed before the reaction throughout the whole process
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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Concept explainers
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.
Question
![The illustration below graphs energy during the formation of a covalent bond. Where can you identify an endothermic reaction?
Chemical Equation:
\[ 2 \text{H}_2 + \text{O}_2 \rightarrow 2 \text{H}_2\text{O} \]
Diagram Explanation:
A graph illustrates the changes in energy during the reaction. The x-axis represents the progression of the reaction, and the y-axis indicates energy levels.
- **Initial Stage**: The graph begins with reactants (2 H₂ and O₂) at a certain energy level.
- **Activation Energy**: This is shown by a peak, indicating that energy is absorbed as bonds are broken.
- **Energy Drop**: After the peak, energy decreases as new bonds are formed in water (H₂O), releasing energy.
Graph Colors and Labels:
- Blue sections depict heat and light energy.
- Green represents chemical energy.
- **Energy Diagram Labels**:
- "Bond energy absorbed" marks the endothermic process during bond breaking.
- "Energy released" indicates the exothermic process during bond formation.
Options for Identifying an Endothermic Reaction:
- O when bonds are broken
- O when new bonds are formed
- O before the reaction
- O throughout the whole process
The correct answer would be "when bonds are broken," as this is typically when energy is absorbed in an endothermic reaction.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F41246b41-0514-4655-8518-9db0e4990a43%2F76b058a1-5639-4dc4-a5d5-89b0f65e8f30%2Fannjk8e_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The illustration below graphs energy during the formation of a covalent bond. Where can you identify an endothermic reaction?
Chemical Equation:
\[ 2 \text{H}_2 + \text{O}_2 \rightarrow 2 \text{H}_2\text{O} \]
Diagram Explanation:
A graph illustrates the changes in energy during the reaction. The x-axis represents the progression of the reaction, and the y-axis indicates energy levels.
- **Initial Stage**: The graph begins with reactants (2 H₂ and O₂) at a certain energy level.
- **Activation Energy**: This is shown by a peak, indicating that energy is absorbed as bonds are broken.
- **Energy Drop**: After the peak, energy decreases as new bonds are formed in water (H₂O), releasing energy.
Graph Colors and Labels:
- Blue sections depict heat and light energy.
- Green represents chemical energy.
- **Energy Diagram Labels**:
- "Bond energy absorbed" marks the endothermic process during bond breaking.
- "Energy released" indicates the exothermic process during bond formation.
Options for Identifying an Endothermic Reaction:
- O when bonds are broken
- O when new bonds are formed
- O before the reaction
- O throughout the whole process
The correct answer would be "when bonds are broken," as this is typically when energy is absorbed in an endothermic reaction.
![**Question 4: Stoichiometry and Chemical Decomposition**
**Problem Statement:**
Determine how many grams of sodium chloride (NaCl) are required to decompose in order to yield 15 grams of chlorine gas (Cl₂). The decomposition reaction is given by the equation:
\[ 2 \text{NaCl} \rightarrow 2 \text{Na} + \text{Cl}_2 \]
**Options:**
- 12.363 g NaCl
- 30 g NaCl
- 49.453 g NaCl
- 0.846 g NaCl
In this problem, you're asked to calculate the required amount of NaCl that would produce a specified mass of Cl₂, using stoichiometry and the balanced chemical equation provided.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F41246b41-0514-4655-8518-9db0e4990a43%2F76b058a1-5639-4dc4-a5d5-89b0f65e8f30%2Fmyw5atd_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Question 4: Stoichiometry and Chemical Decomposition**
**Problem Statement:**
Determine how many grams of sodium chloride (NaCl) are required to decompose in order to yield 15 grams of chlorine gas (Cl₂). The decomposition reaction is given by the equation:
\[ 2 \text{NaCl} \rightarrow 2 \text{Na} + \text{Cl}_2 \]
**Options:**
- 12.363 g NaCl
- 30 g NaCl
- 49.453 g NaCl
- 0.846 g NaCl
In this problem, you're asked to calculate the required amount of NaCl that would produce a specified mass of Cl₂, using stoichiometry and the balanced chemical equation provided.
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