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# Calculate H for the following reaction. Fe3O4s+COg 3FeOs+CO2g HfkJ/mol-1118-110.5-272-393. Calculate the enthalpy for the reaction:

1. Calculate ΔH° for the following reaction.

Fe3O4s+COg → 3FeOs+CO2g ΔHf°kJ/mol-1118-110.5-272-393.5 SC.B.2.4.1

9. Calculate the enthalpy for the reaction:

2ZnSs +3O2g → 2ZnO s+ 2SO2g ΔHf° kJ/mol -206.0 0 -348.3–296.8 SC.B.1.4.1

10. Calculate the ΔG° for the reaction:

2C2H2g+5O2g→ 4CO2g+2H2OlΔG° kJ/mol209.2, 0, -394.4, -237.2 SC.B.2.4.7

11. The temperature of a 2.5 kg sample of silver was heated from 25°C to 45°C. How much energy was absorbed by the silver?

Specific Heats of Common Substances at 298 K 25°C
Specific heat

Substance J/g•°C
Waterl

liquid 4.184
Waters

ice 2.03
Waterg

steam 2.01
Ethanoll

grain alcohol 2.44
Aluminums 0.897
Granites 0.803
Irons 0.449
Silvers 0.235
Golds 0.129

SC.B.1.4.6

12. Given the following information,

SO3 g+ H2Ol→H2SO4 l ΔH° = -133 kJ

Pbs+PbO2 s + 2H2SO4l→2PbSO4s+2H2OlΔH° = -509 kJ

calculate theΔH° for the reaction below.

Pbs+PbO2 s+2SO3 g → 2PbSO4 s SC.B.1.4.6

15. How much heat is evolved when 27.0 g of glucose is burned according to this equation?

C6H12O6 + 6O2 → 6CO2+ 6H2O; Δ H comb. = -2808kJ

Specific Heats of Common Substances at 298 K 25°C
Substance Specific heat

J/g·°C
Waterl

liquid 4.184
Waters

ice 2.03
Waterg

steam 2.01
Ethanoll

grain alcohol 2.44
Aluminums 0.897
Granites 0.803
Irons 0.449
Silvers 0.235
Golds 0.129

SC.B.1.4.6

16. Calculate the amount of heat absorbed by 10.0 grams of ice at -15.0°C as it is converted to liquid water at 50.0°C. The specific heat of H2Os = 2.09 J/g·°C. The specific heat of H2Ol = 4.18 J/g·°C. The heat of fusion is 333 J/g. SC.A.1.4.3

18. How much heat energy is liberated when 11.0 grams of manganese is used in the formation of Mn2O3?

ΔHf° for Mn2O3 is -962.3 kJ/mol SC.1.4.5

20. From the following data,

H2 g+Cl2 g → 2HClg ΔH°v = -185 kJ

2H2 g+O2 g → 2H2Og ΔH° = -483.7 kJ

calculateΔH° for the following reaction.

4HClg +O2 g → 2Cl2 g+ 2H2Og

1. How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? ΔH° for the reaction is +624.7 kJ.

SiO2g+ 3Cs → SiCs+2COg SC.A.1.4.5

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