Standard Enthalpy of Formation and Hess's Law 15. Consider the following data: ΔΗ° (kJ) -62.8 -635.5 -653.1 C₂H₂(g) + 5/2 O2(g) → 2CO₂(g) + H₂O() -1300 C(graphite) + O2(g) → CO₂(g) -393.51 Ca(s) + 2C(graphite) → CaC₂(s) Ca(s) + 1/2O₂(g) → Cao(s) CaO(s) + H₂O() →→→ Ca(OH)₂(aq) 35.5.6.1 1264 101 1000 Use Hess' law to find the change in enthalpy at 25°C for the following equation: CaC₂(s) + 2H₂O(1)→ Ca(OH)₂(aq) + C₂H₂(g)
Standard Enthalpy of Formation and Hess's Law 15. Consider the following data: ΔΗ° (kJ) -62.8 -635.5 -653.1 C₂H₂(g) + 5/2 O2(g) → 2CO₂(g) + H₂O() -1300 C(graphite) + O2(g) → CO₂(g) -393.51 Ca(s) + 2C(graphite) → CaC₂(s) Ca(s) + 1/2O₂(g) → Cao(s) CaO(s) + H₂O() →→→ Ca(OH)₂(aq) 35.5.6.1 1264 101 1000 Use Hess' law to find the change in enthalpy at 25°C for the following equation: CaC₂(s) + 2H₂O(1)→ Ca(OH)₂(aq) + C₂H₂(g)
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter15: Energy And Chemical Change
Section: Chapter Questions
Problem 92A
Related questions
Question
How would you answer this question?
![Standard Enthalpy of Formation and Hess's Law
15. Consider the following data:
Ca(s) + 2C(graphite) → CaC₂(s)
Ca(s) + 1/2O₂(g) →→ CaO(s)
CaO(s) + H₂O(1)→→ Ca(OH)₂(aq)
p
C₂H₂(g) + 5/2 O2(g) → 2CO₂(g) + H₂O(1)
C(graphite) + O₂(g) → CO₂(g)
ΔΗ° (kJ)
-62.8
-635.5
-653.1
-1300
-393.51
K-HA
022+
21000
Use Hess' law to find the change in enthalpy at 25°C for the following equation:
CaC₂(s) + 2H₂O(1)→ Ca(OH)₂(aq) + C₂H₂(g)
141813
116
Toml
Jom!](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5a487c5b-631b-4d04-995d-e7c019732a55%2F42a1ada5-e7a9-44b0-8b51-15419f73aeaa%2Fz854mbi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Standard Enthalpy of Formation and Hess's Law
15. Consider the following data:
Ca(s) + 2C(graphite) → CaC₂(s)
Ca(s) + 1/2O₂(g) →→ CaO(s)
CaO(s) + H₂O(1)→→ Ca(OH)₂(aq)
p
C₂H₂(g) + 5/2 O2(g) → 2CO₂(g) + H₂O(1)
C(graphite) + O₂(g) → CO₂(g)
ΔΗ° (kJ)
-62.8
-635.5
-653.1
-1300
-393.51
K-HA
022+
21000
Use Hess' law to find the change in enthalpy at 25°C for the following equation:
CaC₂(s) + 2H₂O(1)→ Ca(OH)₂(aq) + C₂H₂(g)
141813
116
Toml
Jom!
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
Step 1
Hess's law describes that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Follow-up Questions
Read through expert solutions to related follow-up questions below.
Follow-up Question
Can you explain what has been added together in step 3?
Solution
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
Chemistry: Matter and Change
Chemistry
ISBN:
9780078746376
Author:
Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:
Glencoe/McGraw-Hill School Pub Co
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781337399074/9781337399074_smallCoverImage.gif)
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781133949640/9781133949640_smallCoverImage.gif)
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: Matter and Change
Chemistry
ISBN:
9780078746376
Author:
Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:
Glencoe/McGraw-Hill School Pub Co
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781337399074/9781337399074_smallCoverImage.gif)
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781133949640/9781133949640_smallCoverImage.gif)
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
![General Chemistry - Standalone book (MindTap Cour…](https://www.bartleby.com/isbn_cover_images/9781305580343/9781305580343_smallCoverImage.gif)
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
![Chemistry: The Molecular Science](https://www.bartleby.com/isbn_cover_images/9781285199047/9781285199047_smallCoverImage.gif)
Chemistry: The Molecular Science
Chemistry
ISBN:
9781285199047
Author:
John W. Moore, Conrad L. Stanitski
Publisher:
Cengage Learning
![Chemistry: Principles and Practice](https://www.bartleby.com/isbn_cover_images/9780534420123/9780534420123_smallCoverImage.gif)
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning