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78 solutions

Spontaneous Reaction

Q. For the reaction, C 2 H 6 ( g ) ⟶ C 2 H 4 ( g ) + H 2 ( g ) ΔH° is +137 kJ/mol and ΔS° is + 120 J/(mol·K). This reaction is ____________. Group of answer choices nonspontaneous only at high temperature. nonspontaneous at all temperatures. spontaneous only at high temperature. spontaneous at all temperatures. spontaneous only at low temperature.

Solved • Dec 3, 2019

Spontaneous Reaction

Q. A reaction that is spontaneous as written __________. Group of answer choices does not depend on the temperature of the reaction. is also spontaneous in the reverse direction. has an equilibrium position that lies far to the left. is very rapid. will proceed without outside intervention.

Solved • Dec 3, 2019

Spontaneous Reaction

Q. Consider the following table that contains an assortment of compounds and their corresponding standard free energies of formation (ΔG°f). Which of these liquids are thermodynamically more stable than their constituent elements? Select all of the correct answers. a) Methanol b) Hydrogen Peroxide c) Carbon Disulfide d) Hydrazine e) Cyclohexane

Solved • Dec 3, 2019

Spontaneous Reaction

Q. Consider the following vaporization reaction. Br2(l) → Br2(g) At a certain pressure, ΔH° = 34 kJ/mol and ΔS° = 0.098 kJ/mol•K. What is the lowest temperature at which this process is spontaneous? a) 347 K b) 0.00288 K c) 74 K d) -347 K

Solved • Dec 3, 2019

Spontaneous Reaction

Q. The condensation of water has a negative ΔH and a negative ΔS. What can you conclude about the spontaneity of the process?

Solved • Dec 2, 2019

Spontaneous Reaction

Q. What can be said about an exothermic reaction with a negative entropy change?

Solved • Dec 2, 2019

Spontaneous Reaction

Q. What can be said about an endothermic reaction with a negative entropy change?

Solved • Dec 2, 2019