ΔΗ° = ? QUESTION 9 Using Hess's Law and the equations (1)-(3) below calculate AH at 25°C for coal gasification: 2 C(coal) + 2 H₂O(g) →→→ CH4(g) + CO2(g) 1. CO(g) + H₂(g) →C(coal) + H₂O(g) CO(g) + H₂O(g) → CO2(g) + H2(g) CH4(g) + H2O(g) AH°=-131 kJ/mol AH°=-41 kJ/mol AH°=-206 kJ/mol
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 9
Using Hess's Law and the equations (1)-(3) below calculate AH° at 25°C for coal gasification:
2 C(coal) + 2 H₂O(g) →→→ CH4(g) + CO2(g)
1. CO(g) + H2(g) →C(coal) + H₂O(g)
2. CO(g) + H₂O(g) →CO2(g) + H2(g)
→ CH4(9) + H₂O(g)
3. CO(g) + 3 H2(g)
OA. +116 kJ/mol
OB. +15 kJ/mol
OC-116 kJ/mol
AH°=?
OD.-372 kJ/mol
OE-378 kJ/mol
AH° = -131 kJ/mol
AH°=-41 kJ/mol
AH°=-206 kJ/mol
MacBook Air
mit. Click Save All Answers to save all answers.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff5fc9088-6d0a-4312-bffe-77961b56b51f%2F5952b539-10af-41cf-90fe-b5edd0ebbf4b%2F3apnz2w_processed.jpeg&w=3840&q=75)
![Question Completion Status:
QUESTION 10
The apparatus shown consists of three bulbs, connected by stopcocks. Bulb A contains CO2 at a pressure of 2.35 atm and has a volume of 3.05 L. Bulb B is empty and
has a volume of 1.0 L. Bulb C contains Ar at a pressure of 3.57 atm and has a volume of 2.75 L. What is the total pressure inside the system after the stopcocks are
opened and the gases freely mix? Assume the lines connecting the bulbs have zero volume and the temperature remains constant. Enter the answer to 3 significant
figures.
A
C
IncBook Air
8
J
F10
4
F11](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff5fc9088-6d0a-4312-bffe-77961b56b51f%2F5952b539-10af-41cf-90fe-b5edd0ebbf4b%2Fxclmu9n_processed.jpeg&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 3 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781259911156/9781259911156_smallCoverImage.gif)
![Principles of Instrumental Analysis](https://www.bartleby.com/isbn_cover_images/9781305577213/9781305577213_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781259911156/9781259911156_smallCoverImage.gif)
![Principles of Instrumental Analysis](https://www.bartleby.com/isbn_cover_images/9781305577213/9781305577213_smallCoverImage.gif)
![Organic Chemistry](https://www.bartleby.com/isbn_cover_images/9780078021558/9780078021558_smallCoverImage.gif)
![Chemistry: Principles and Reactions](https://www.bartleby.com/isbn_cover_images/9781305079373/9781305079373_smallCoverImage.gif)
![Elementary Principles of Chemical Processes, Bind…](https://www.bartleby.com/isbn_cover_images/9781118431221/9781118431221_smallCoverImage.gif)