eats of formation given in the table: ! Formula C₂H2(g) 226.7 NH3(g) -46.19 C6H6(1) 49.0 ate CaCo3(s) -1207.1 -635.5 CaO(s) CO2(g) AH f (kJ/mol) ide CO(g) C(s) -393.5 -110.5 1.88 C₂H6(8) -84.68 C₂H5 OH (1) -277.7 Substance - Hydrogen chloride Hydrogen fluoride Hydrogen iodide Methane Methanol Propane Silver chloride Sodium bicarbonate Sodium carbonate Sodium chloride C₂H4(8) 52.30 C6H12O6 -1273 (s) nide HBr(g) -36.23 Water vapor :a, determine the enthalpy change for the reaction: 2 CH4(g) + O₂(8) Sucrose Water 2 CH3OH(e) Formula AH f (kJ/mol) HCI(g) HF(g) HI(g) 25.9 CH4(8) -74.80 |CH3 ОН -238.6 (1) C3H8(g) -103.85 -127.0 AgCl(s) NaHCO3 (s) C12H22O11130.9 (s) NaCl -92.30 -268.60 -947.7 -410.9 C12H22O11221 (s) H₂O(l) -285.8 H₂O(g) -241.8
eats of formation given in the table: ! Formula C₂H2(g) 226.7 NH3(g) -46.19 C6H6(1) 49.0 ate CaCo3(s) -1207.1 -635.5 CaO(s) CO2(g) AH f (kJ/mol) ide CO(g) C(s) -393.5 -110.5 1.88 C₂H6(8) -84.68 C₂H5 OH (1) -277.7 Substance - Hydrogen chloride Hydrogen fluoride Hydrogen iodide Methane Methanol Propane Silver chloride Sodium bicarbonate Sodium carbonate Sodium chloride C₂H4(8) 52.30 C6H12O6 -1273 (s) nide HBr(g) -36.23 Water vapor :a, determine the enthalpy change for the reaction: 2 CH4(g) + O₂(8) Sucrose Water 2 CH3OH(e) Formula AH f (kJ/mol) HCI(g) HF(g) HI(g) 25.9 CH4(8) -74.80 |CH3 ОН -238.6 (1) C3H8(g) -103.85 -127.0 AgCl(s) NaHCO3 (s) C12H22O11130.9 (s) NaCl -92.30 -268.60 -947.7 -410.9 C12H22O11221 (s) H₂O(l) -285.8 H₂O(g) -241.8
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.77QP: Hydrazine, N2H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the...
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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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Transcribed Image Text:eats of formation given in the table:
!
Formula
C₂H2(g) 226.7
NH3(g)
-46.19
C6H6(1) 49.0
ate CaCo3(s) -1207.1
-635.5
CaO(s)
CO2(g)
AH f
(kJ/mol)
ide CO(g)
C(s)
-393.5
-110.5
1.88
C₂H6(8) -84.68
C₂H5 OH
(1)
-277.7
C₂H4(8) 52.30
C6H12O6
-1273
Substance
OA Hrxn = 327.6 kJ/mol
OA Hrxn = -163.8 kJ/mol
OAHrxn = -327.6 kJ/mol
OA Hrxn = 56.1 kJ/mol
OA Hrxn = 163.8 kJ/mol
Hydrogen chloride
Hydrogen fluoride
Hydrogen iodide
Methane
Methanol
Propane
Silver chloride
Sodium bicarbonate
Sodium carbonate
Sodium chloride
Sucrose
Water
(s)
nide HBr(g)
-36.23
Water vapor
:a, determine the enthalpy change for the reaction:
2 CH4(g) + O₂(g) 2 CH3OH(e)
Formula
AH f
(kJ/mol)
HCI(g)
HF(g)
HI(g)
25.9
CH4(g) -74.80
|CH3 ОН
-238.6
(1)
C3H8(g) -103.85
-127.0
AgCl(s)
NaHCO3
(s)
C12H22O11130.9
(s)
NaCl
-92.30
-268.60
-947.7
-410.9
C12H22O11221
(s)
H₂O(l)
-285.8
H₂O(g) -241.8
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