Using enthalpies of formation (Appendix C), calculate Δ H ° for the following reaction at 25°C. Also calculate Δ S ° for this reaction from standard entropies at 25°C. Use these values to calculate Δ G ° for the reaction at this temperature. 4 HCN ( l ) + 5 O 2 ( g ) → 2 H 2 O ( g ) + 4 CO ( g ) + 2 N 2 ( g )
Using enthalpies of formation (Appendix C), calculate Δ H ° for the following reaction at 25°C. Also calculate Δ S ° for this reaction from standard entropies at 25°C. Use these values to calculate Δ G ° for the reaction at this temperature. 4 HCN ( l ) + 5 O 2 ( g ) → 2 H 2 O ( g ) + 4 CO ( g ) + 2 N 2 ( g )
Solution Summary: The author explains that free energy is measured by subtracting the product of temperature and entropy from the entthalpy of a system.
Using enthalpies of formation (Appendix C), calculate ΔH° for the following reaction at 25°C. Also calculate ΔS° for this reaction from standard entropies at 25°C. Use these values to calculate ΔG° for the reaction at this temperature.
4
HCN
(
l
)
+
5
O
2
(
g
)
→
2
H
2
O
(
g
)
+
4
CO
(
g
)
+
2
N
2
(
g
)
Experiment 1
Data Table 1: Conservation of Mass - Initial Mass
Data Table 1
Data Table 2
Data Table 3
Data Table 4
Panel 1
Photo 1
Data Table 5
Reaction Mass of test tube and 5.0% HC₂H₂O2 (g)
#
(A)
(B)
Mass of NaHCO, (g) Mass of balloon and NaHCO, (g)
(C)
0.10
1
0829
14.38g
0.20
2
0.929
14.29g
0.35
1.00g
3
14.25g
0.50
1.14g
14.29
Experiment 1
Data Table 2: Moles of HC2H3O2
Reaction Volume of Mass of
Moles of HC₂H₂O₂
5.0%
Vinegar
(g)
(ML)
5.0
0.25
0042 mol
2
5.0
0.25
0042 mol
3
5.0
0.25
0042 mol
5.0
0.25
0042 mol
Experiment 1
Data Table 3: Moles of NaHCO3
Reaction Mass of NaHCO (g)
10g
20g
35g
50g
Experiment 1
Data Table 4: Theoretical Yield of CO₂
Reaction #
1
2
3
Experiment 1
Total mass before reaction (g)
(D=A+C)
15.29
15.21g
15.25g
15.349
Exercise 1
Data Table 1
Data Table 2
Data Table 3
Data Table 4
Panel 1
Photo 1
Data Table 5
Exercise 1-
Data Table 1
Data Table 2
DataTable 3
Data Table 4
Panel 1
Photo 1
Data Table 5
Exercise 1-
Moles of NaHCO
0012 mol
0025 mol
0044 mol
0062 mol…
The chemical reaction you investigated is a two-step reaction. What type of reaction occurs in each step? How did you determine your answer?
What is the relationship between the limiting reactant and theoretical yield of CO2?
Chapter 18 Solutions
OWLv2 for Ebbing/Gammon's General Chemistry, 11th Edition, [Instant Access], 1 term (6 months)
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