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CHз CHз СН, ГI Н.С —СН—СН—СН—СН; TABLE 5.3 Standard Enthalpies of Formation, AH, at 298 K дн, (КJ/mol) Substance Formula дн (К/mol) Substance Formula CH2(8) Acetylene HCI(g) 226.7 Hydrogen chloride -92.30 Ammonia NH3(8) Hydrogen fluoride -46.19 HF(g) -268.60 CHo(1) Hydrogen iodide HI(g) 25.9 Benzene 49.0 CaCOs(s) -1207.1 Calcium carbonate Methane CH(8) -74.80 CaO(s) Methanol CH,ОН() Calcium oxide -635.5 -238.6 CO2(8) Carbon dioxide -103.85 -393.5 Propane C3Hs(8) Carbon monoxide CO(g) -110.5 Silver chloride AgCI(s) -127.0 Sodium bicarbonate Diamond C(s) 1.88 NaHCO,(s) -947.7 C2H6(8) NazCO3(s) Ethane -84.68 Sodium carbonate -1130.9 NACI(s) Ethanol CэHsОН() -277.7 Sodium chloride -410.9 Ethylene C,H4(8) C12H„O1(s) 52.30 Sucrose -2221 Water Glucose CH12O6(s) -1273 H20(1) -285.8 Hydrogen bromide Water vapor H,O(g) HBr(g) -36.23 -241.8

CHз CHз СН, ГI Н.С —СН—СН—СН—СН; TABLE 5.3 Standard Enthalpies of Formation, AH, at 298 K дн, (КJ/mol) Substance Formula дн (К/mol) Substance Formula CH2(8) Acetylene HCI(g) 226.7 Hydrogen chloride -92.30 Ammonia NH3(8) Hydrogen fluoride -46.19 HF(g) -268.60 CHo(1) Hydrogen iodide HI(g) 25.9 Benzene 49.0 CaCOs(s) -1207.1 Calcium carbonate Methane CH(8) -74.80 CaO(s) Methanol CH,ОН() Calcium oxide -635.5 -238.6 CO2(8) Carbon dioxide -103.85 -393.5 Propane C3Hs(8) Carbon monoxide CO(g) -110.5 Silver chloride AgCI(s) -127.0 Sodium bicarbonate Diamond C(s) 1.88 NaHCO,(s) -947.7 C2H6(8) NazCO3(s) Ethane -84.68 Sodium carbonate -1130.9 NACI(s) Ethanol CэHsОН() -277.7 Sodium chloride -410.9 Ethylene C,H4(8) C12H„O1(s) 52.30 Sucrose -2221 Water Glucose CH12O6(s) -1273 H20(1) -285.8 Hydrogen bromide Water vapor H,O(g) HBr(g) -36.23 -241.8

Chemistry
Chemistry
10th Edition
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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Gasoline is composed primarily of hydrocarbons, including
many with eight carbon atoms, called octanes. One of
the cleanest–burning octanes is a compound called 2,3,4-
trimethylpentane, which has the following structural formula  

The complete combustion of one mole of this compound
to CO21g2 and H2O1g2 leads to ΔH° = -5064.9 kJ.
(a) Write a balanced equation for the combustion of
1 mol of C8H181l2. (b) By using the information in
this problem and data in Table 5.3, calculate ΔHf° for
2,3,4-trimethylpentane.

CHз CHз СН, ГI Н.С —СН—СН—СН—СН;
Transcribed Image Text:CHз CHз СН, ГI Н.С —СН—СН—СН—СН;
TABLE 5.3 Standard Enthalpies of Formation, AH, at 298 K дн, (КJ/mol) Substance Formula дн (К/mol) Substance Formula CH2(8) Acetylene HCI(g) 226.7 Hydrogen chloride -92.30 Ammonia NH3(8) Hydrogen fluoride -46.19 HF(g) -268.60 CHo(1) Hydrogen iodide HI(g) 25.9 Benzene 49.0 CaCOs(s) -1207.1 Calcium carbonate Methane CH(8) -74.80 CaO(s) Methanol CH,ОН() Calcium oxide -635.5 -238.6 CO2(8) Carbon dioxide -103.85 -393.5 Propane C3Hs(8) Carbon monoxide CO(g) -110.5 Silver chloride AgCI(s) -127.0 Sodium bicarbonate Diamond C(s) 1.88 NaHCO,(s) -947.7 C2H6(8) NazCO3(s) Ethane -84.68 Sodium carbonate -1130.9 NACI(s) Ethanol CэHsОН() -277.7 Sodium chloride -410.9 Ethylene C,H4(8) C12H„O1(s) 52.30 Sucrose -2221 Water Glucose CH12O6(s) -1273 H20(1) -285.8 Hydrogen bromide Water vapor H,O(g) HBr(g) -36.23 -241.8
Transcribed Image Text:TABLE 5.3 Standard Enthalpies of Formation, AH, at 298 K дн, (КJ/mol) Substance Formula дн (К/mol) Substance Formula CH2(8) Acetylene HCI(g) 226.7 Hydrogen chloride -92.30 Ammonia NH3(8) Hydrogen fluoride -46.19 HF(g) -268.60 CHo(1) Hydrogen iodide HI(g) 25.9 Benzene 49.0 CaCOs(s) -1207.1 Calcium carbonate Methane CH(8) -74.80 CaO(s) Methanol CH,ОН() Calcium oxide -635.5 -238.6 CO2(8) Carbon dioxide -103.85 -393.5 Propane C3Hs(8) Carbon monoxide CO(g) -110.5 Silver chloride AgCI(s) -127.0 Sodium bicarbonate Diamond C(s) 1.88 NaHCO,(s) -947.7 C2H6(8) NazCO3(s) Ethane -84.68 Sodium carbonate -1130.9 NACI(s) Ethanol CэHsОН() -277.7 Sodium chloride -410.9 Ethylene C,H4(8) C12H„O1(s) 52.30 Sucrose -2221 Water Glucose CH12O6(s) -1273 H20(1) -285.8 Hydrogen bromide Water vapor H,O(g) HBr(g) -36.23 -241.8
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