If a cube of ice at 0°C is placed outside on a warm summer day, the ice will melt spontaneously. What are the signs of ΔrH, ΔrS, and ΔrG for this process? Why? Estimate the boiling point of ethanol given the following thermodynamic parameters. C2H5OH(l) C2H5OH(g) ΔfH° (kJ/mol) –277.0 –235.3 S° (J/K-mol) 160.7 282.7 ΔfG° (kJ/mol) –174.7 –168.5 Estimate ΔG°rxn for the following reaction at 417 K given the following thermodynamic information. HCN(g) + 2 H2(g) → CH3NH2(g) ΔH°= -158.0 kJ; ΔS°= -219.9 J/K PreviousNext
If a cube of ice at 0°C is placed outside on a warm summer day, the ice will melt spontaneously. What are the signs of ΔrH, ΔrS, and ΔrG for this process? Why? Estimate the boiling point of ethanol given the following thermodynamic parameters. C2H5OH(l) C2H5OH(g) ΔfH° (kJ/mol) –277.0 –235.3 S° (J/K-mol) 160.7 282.7 ΔfG° (kJ/mol) –174.7 –168.5 Estimate ΔG°rxn for the following reaction at 417 K given the following thermodynamic information. HCN(g) + 2 H2(g) → CH3NH2(g) ΔH°= -158.0 kJ; ΔS°= -219.9 J/K PreviousNext
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Chapter18: Thermodynamics And Equilibrium
Section: Chapter Questions
Problem 18.68QP: The combustion of acetylene, C2H2, is a spontaneous reaction given by the equation...
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Question
- If a cube of ice at 0°C is placed outside on a warm summer day, the ice will melt spontaneously.
What are the signs of ΔrH, ΔrS, and ΔrG for this process? Why?
- Estimate the boiling point of ethanol given the following
thermodynamic parameters.
|
|
C2H5OH(l) |
C2H5OH(g) |
|
ΔfH° (kJ/mol) |
–277.0 |
–235.3 |
|
S° (J/K-mol) |
160.7 |
282.7 |
|
ΔfG° (kJ/mol) |
–174.7 |
–168.5 |
- Estimate ΔG°rxn for the following reaction at 417 K given the following thermodynamic information.
HCN(g) + 2 H2(g) → CH3NH2(g) ΔH°= -158.0 kJ; ΔS°= -219.9 J/K
PreviousNext
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