2Zn(s) + 2CO(g) + 2SO2(g)
1) Zinc can be processed from its ore according to the following reaction.
2ZnS(s) + 3O2(g) + 2C(s)
2Zn(s) + 2CO(g) + 2SO2(g)
Using the data given, calculate the change in enthalpy.
2ZnO(s) + 2SO2(g)
2ZnS(s) + 3O2(g) Δ
H = 1084.24 kJ
ZnO(s) + C(s)
Zn(s) + CO(g) Δ
H = 237.76 kJ
(a) 1322.0 kJ
(b) -608.7 kJ
(c) 1559.8 kJ
(d) -846.5 kJ
2) Graphite can be converted to ethane according to the following reaction.
2C(graphite) + 3H2(g)
C2H6(g)
Using the data given, calculate the change in enthalpy.
C(graphite) + O2(g)
CO2(g) Δ
H = -393.5 kJ
2H2(g) + O2(g)
2H2O(l) Δ
H = -571.6 kJ
2C2H6(g) + 7O2(g)
4CO2(g) + 6H2O(l)
Δ H = -3119.6 kJ
(a) -84.6 kJ
(b) -3204.2 kJ
(c) -4084.7 kJ
(d) 2154.5 kJ
3) Sulfuric acid can be produced according to the following reaction.
2S(s) + 3O2(g) + 2H2O(l)
2H2SO4(l)
Using the data given, calculate the change in enthalpy.
S(s) + O2(g)
SO2(g) Δ
H = -296.83 kJ
2SO3(g)
O2(g) + 2SO2(g) Δ
H = -198.2 kJ
SO3(g) + H2O(l)
H2SO4(l) Δ
H = –227.72 kJ
(a) -849.9 kJ
(b) -722.8 kJ
(c) -1246.3 kJ
(d) -326.4 kJ
4) Graphite can be converted to acetylene according to the following reaction.
2C(graphite) + H2(g)
C2H2(g)
Using the data given, calculate the change in enthalpy.
C(graphite) + O2(g)
CO2(g) Δ
H = -393.5 kJ
2H2(g) + O2(g)
2H2O(l) Δ
H = -571.6 kJ
2C2H2(g) + 5O2(g)
4CO2(g) + 2H2O(l)
Δ H = -2598.8 kJ
(a) 226.6 kJ
(b) 1633.7 kJ
(c) -2372.2 kJ
(d) -3563.9 kJ
5) Iron can be reduced to the pure metal from the ore according to the following reaction.
Fe2O3(s) + 3CO(g)
2Fe(s) + 3CO2(g)
Using the data given, calculate the change in enthalpy.
3Fe2O3(s) + CO(g)
2Fe3O4(s) + CO2(g) Δ
H = -46.4 kJ
Fe(s) + CO2(g)
FeO(s) + CO(g)
Δ H = -9.0 kJ
Fe3O4(s) + CO(g)
3FeO(s) + CO2(g)
Δ H = -41.0 kJ
(a) -96.4 kJ
(b) -78.4 kJ
(c) -42.8 kJ
(d) -24.8 kJ