A chemist measures the energy change AH during the following reaction: Cl₂(g)+H₂(g) → 2 HCl(g) ΔΗ= - 184. kJ Use the information to answer the following questions. This reaction is... Suppose 81.8 g of Cl₂ react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your answer to 3 significant digits. endothermic. exothermic. Yes, absorbed. Yes, released. No. 0 kJ X 3
A chemist measures the energy change AH during the following reaction: Cl₂(g)+H₂(g) → 2 HCl(g) ΔΗ= - 184. kJ Use the information to answer the following questions. This reaction is... Suppose 81.8 g of Cl₂ react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your answer to 3 significant digits. endothermic. exothermic. Yes, absorbed. Yes, released. No. 0 kJ X 3
Chemistry
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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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![### Reaction Energy Calculation: Exothermic and Endothermic Analysis
A chemist measures the energy change \(\Delta H\) during the following reaction:
\[ \text{Cl}_2(g) + \text{H}_2(g) \rightarrow 2 \text{HCl}(g) \]
\[ \Delta H = -184 \, \text{kJ} \]
Use the information to answer the following questions.
---
#### This reaction is...
- [ ] endothermic.
- [x] exothermic.
#### Suppose 81.8 g of \(\text{Cl}_2\) react.
Will any heat be released or absorbed?
- [ ] Yes, absorbed.
- [x] Yes, released.
- [ ] No.
#### If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed.
\[ \boxed{} \, \text{kJ} \]
#### Round your answer to 3 significant digits.
---
**Buttons:**
- **Explanation**
- **Check**
**Note:**
There are no graphs or diagrams associated with this part of the content.
---
**Educational Context Explanation:**
In this exercise, students are asked to work through a thermodynamic problem where they are given the enthalpy change (\(\Delta H\)) of a chemical reaction. The exercise tests their understanding of whether the reaction is exothermic or endothermic, and their ability to calculate the amount of heat released or absorbed during the reaction based on given masses of reactants.
Key points learned:
1. What indicates an exothermic or endothermic reaction.
2. How to determine heat release or absorption based on chemical information.
3. How to perform stoichiometric calculations to link enthalpy changes to specific quantities of substances.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F11fddf9f-a89a-44ba-8382-9c550e4fed12%2F6f2c02e1-c06a-410d-af6e-70c116a94b68%2Fymxhe2c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Reaction Energy Calculation: Exothermic and Endothermic Analysis
A chemist measures the energy change \(\Delta H\) during the following reaction:
\[ \text{Cl}_2(g) + \text{H}_2(g) \rightarrow 2 \text{HCl}(g) \]
\[ \Delta H = -184 \, \text{kJ} \]
Use the information to answer the following questions.
---
#### This reaction is...
- [ ] endothermic.
- [x] exothermic.
#### Suppose 81.8 g of \(\text{Cl}_2\) react.
Will any heat be released or absorbed?
- [ ] Yes, absorbed.
- [x] Yes, released.
- [ ] No.
#### If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed.
\[ \boxed{} \, \text{kJ} \]
#### Round your answer to 3 significant digits.
---
**Buttons:**
- **Explanation**
- **Check**
**Note:**
There are no graphs or diagrams associated with this part of the content.
---
**Educational Context Explanation:**
In this exercise, students are asked to work through a thermodynamic problem where they are given the enthalpy change (\(\Delta H\)) of a chemical reaction. The exercise tests their understanding of whether the reaction is exothermic or endothermic, and their ability to calculate the amount of heat released or absorbed during the reaction based on given masses of reactants.
Key points learned:
1. What indicates an exothermic or endothermic reaction.
2. How to determine heat release or absorption based on chemical information.
3. How to perform stoichiometric calculations to link enthalpy changes to specific quantities of substances.
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