2) Compare your calculated AH values with real "enthalpy of combustion" values using the links above. How do your results compare? What does this say about your method for estimating AH values?
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.
![3) Сна
H1
1
C - H + 20-0
(
H
H
во Bond brokeu
4 C-H bond
20=0 bond
C) AH = [BDE ´ of bonds breaking] - [BOE's of bonds formed)
DH = 4 x B.D.Ex (C-H) + 2x B-DEX (0-7)
= [4 (911) +2(9947 - 2(799)-9 (959)] kg/mol
-802 kg/mol
1
DJ molar mans of CH4=16-09 g/mol
-80215/md
16.09g/mo
AH in
Bond Formed
了
13
gas
g
AH = -sok)/g
P
-D
· 0=c=0 + 2 H-O-H
OH in F? /mol
mxm of CHq
Std enthalpy change
of formation, AH gas
Standard molar entropy,
Se
Gas properties
van der Waals' constants[10]
-74.6 kJ/mol[8]
Enthalpy of combustion AH-891 kJ/mol[⁹]
Heat capacity, Cp
186.3 J/(mol K)[8]
35.7 J/(mol K)[8]
2
a = 228.29 L² kPa/mol²
b = 0.04278 L/mol
Vapor pressure of liquid [edit]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff516812d-caee-4a18-bb46-81090bf5ca18%2Feac4dbaf-358b-4ee1-9a94-3af13084e2a9%2Fgi52i1_processed.jpeg&w=3840&q=75)
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