a. 0.045 g of sulfur (rhombic) burns, forming SO2 (g) ( A;H° for SO2 (g) 296.84 kJ/mol) Enthalpy change = kJ %3! b. 0.36 mol of HgO(s) decomposes to Hg(e) and O2 (8) ( A¡H° for HgO = -90.83 kJ/mol) Enthalpy change = kJ c. 2.85 g of NH3(g) is formed from N2(g) and excess H2 (g) ( A;H° for NH3 = -45.90 kJ/mol) %3D Enthalpy change = kJ d. 1.06 x 10-2 mol of carbon is oxidized to CO2 (g) ( AƒH° for CO2 = -393.509 kJ/mol) Enthalpy change = kJ

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
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a. 0.045 g of sulfur (rhombic) burns, forming
SO2 (g) (
A¡H° for
SO2 (g) = - 296.84 kJ/mol)
Enthalpy change =
kJ
%3D
b. 0.36 mol of
HgO(s) decomposes to
Hg(l) and
O2 (g) (
A;H° for
HgO = -90.83 kJ/mol)
%3D
Enthalpy change =
kJ
c. 2.85 g of
NH3 (g) is formed from
N2 (g) and excess
H2 (g) (
AƒH° for
NH3 = -45.90 kJ/mol)
%3!
Enthalpy change =
kJ
%3D
d. 1.06 x 10-2 mol of carbon is oxidized to
CO2 (g) (
AƒH° for
CO2 = -393.509 kJ/mol)
Enthalpy change =
kJ
Transcribed Image Text:a. 0.045 g of sulfur (rhombic) burns, forming SO2 (g) ( A¡H° for SO2 (g) = - 296.84 kJ/mol) Enthalpy change = kJ %3D b. 0.36 mol of HgO(s) decomposes to Hg(l) and O2 (g) ( A;H° for HgO = -90.83 kJ/mol) %3D Enthalpy change = kJ c. 2.85 g of NH3 (g) is formed from N2 (g) and excess H2 (g) ( AƒH° for NH3 = -45.90 kJ/mol) %3! Enthalpy change = kJ %3D d. 1.06 x 10-2 mol of carbon is oxidized to CO2 (g) ( AƒH° for CO2 = -393.509 kJ/mol) Enthalpy change = kJ
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