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18 Dec 2019

Elemental mercury can be produced from its oxide:
2HgO(s)→2Hg(l)+O2(g)

Part A

Use data in Appendix B to calculate ΔSsys for this reaction.

Express your answer to four significant figures and include the appropriate units.

Part B

Use data in Appendix B to calculate ΔSsurr for this reaction.

Express your answer to four significant figures and include the appropriate units.

Part C

Use data in Appendix B to calculate ΔStotal for this reaction.

Express your answer to four significant figures and include the appropriate units.

Part D

Estimate the temperature at which the reaction will become spontaneous.

Express your answer to four significant figures and include the appropriate units.

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Related questions


Use the data in Appendix B in the textbook to calculate ΔH∘ and ΔS∘ for each of the following reactions. From the values of ΔH∘ and ΔS∘, calculate ΔG∘ at 25 ∘C and predict whether each reaction is spontaneous under standard-state conditions.
Part A
2SO2(g)+O2(g)→2SO3(g)
Express your answer using four significant figures.

ΔH∘ =
kJ


Part B
Express your answer using four significant figures.

ΔS∘ =
J/K


Part C
Express your answer using four significant figures.

ΔG∘ =
kJ


Part D

spontaneous under standard-state conditions
nonspontaneous under standard-state conditions

Consider the reaction

8H2S(g)+4O2(g)→8H2O(g)+S8(g)

Δ[H2S]/Δt = -0.086 M/s

a. Find Δ[O2]/Δt. (Express your answer to two significant figures and include the appropriate units.)

b. Find Δ[H2O]/Δt. (Express your answer to two significant figures and include the appropriate units.)

c. Find Δ[S8]/Δt. (Express your answer to two significant figures and include the appropriate units.)

d. Find the rate of the reaction. (Express your answer to two significant figures and include the appropriate units.)

Consider the formation of glucose from carbon dioxide and water (i.e., the reaction of the photosynthetic process): 6CO2(g)+6H2O(l)→C6H12O6(s)+6O2(g)

The following table of information will be useful in working this problem:

T= 298 K CO2(g) H2O(l) C6H12O6(s) O2(g)
ΔH∘f (kJ mol−1) -393.5 -285.8 -1273.1 0.0
S∘ (J mol−1 K−1) 213.8 70.0 209.2 205.2
C∘P,m (J mol−1 K−1) 37.1 75.3 219.2 29.4

Part A: Calculate the entropy change for this chemical system at 316 K .

Express your answer to four significant figures and include the appropriate units.

Part B:

Calculate the enthalpy change for this chemical system at 316 K .

Express your answer to four significant figures and include the appropriate units.

Part C:

Calculate the entropy change of the surroundings at 316 K .

Express your answer to three significant figures and include the appropriate units.

Part D:

Calculate the entropy change of the universe at 316 K .

Express your answer to three significant figures and include the appropriate units.

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