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Spontaneous Reaction

Q. Why water spontaneously freezes to form ice below 0°C even tho entropy of the water decreases during the state transition? Why is the freezing of water not spontaneous above 0°C?

Solved • Apr 29, 2020

Spontaneous Reaction

Q. Comment on the spontaneity of the following reaction at 25 degree Celsius.

Solved • Apr 21, 2020

Spontaneous Reaction

Q. A process increases the entropy of the system by 132 J/mol K and absorbs 43 kJ/mol of heat from the surroundings. Is this process spontaneous at high temperature or low temperature? At what temperature does it switch?

Solved • Apr 16, 2020

Spontaneous Reaction

Q. Above what temperature does the following reaction become nonspontaneous? 2H2S (g) + 3O2 (g) --> 2SO2(g) + 2H2O(g) H= -1036 kJ. S= -153.2 J/K

Solved • Apr 7, 2020

Spontaneous Reaction

Q. Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? Drag the appropriate items to their respective bins.

Solved • Mar 31, 2020

Spontaneous Reaction

Q. For the reaction 2BrF3(g) → Br2(g) + 3F(g) ΔH° = 542 kJ and ΔS° = 269 J/K ΔG° would be negative at temperatures (above, below) _______ K. Enter above or below in the first box and enter the temperature in the second box. Assume that ΔH° and ΔS° are constant.

Solved • Mar 30, 2020

Spontaneous Reaction

Q. For the reaction Fe2O3(s) + 3H2(g) → 2Fe2(s) + 3H2O(g) ΔH° = 98.8 kJ and ΔS° = 143 J/K ΔG° would be negative at temperatures (above, below) _____ K. Enter above or below in the first box and enter the temperature in the second box. Assume that ΔH° and ΔS° are constant.

Solved • Mar 30, 2020