For a particular reaction, AH = -28.4 kJ and AS = -87.9 J/K. Assuming these values change very little with temperature, at what temperature does the reaction change from nonspontaneous to spontaneous? T = Is the reaction in the forward direction spontaneous at temperatures greater than or less than the calculated temperature? less than Ogreater than K

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## Understanding Reaction Spontaneity

For a particular reaction, the change in enthalpy (\(\Delta H^\circ\)) is -28.4 kJ and the change in entropy (\(\Delta S^\circ\)) is -87.9 J/K. Assuming these values change very little with temperature, the task is to determine at what temperature the reaction changes from nonspontaneous to spontaneous.

### Calculate the Transition Temperature

\[ T = \]

### Determine Reaction Spontaneity

Is the reaction in the forward direction spontaneous at temperatures greater than or less than the calculated temperature?

- ○ less than
- ○ greater than

To find when the reaction becomes spontaneous, use the Gibbs free energy equation:

\[
\Delta G = \Delta H - T \Delta S
\]

Set \(\Delta G\) to zero and solve for \(T\) to determine the transition temperature where the reaction changes from nonspontaneous to spontaneous. Choose the correct condition under which the reaction remains spontaneous.
Transcribed Image Text:## Understanding Reaction Spontaneity For a particular reaction, the change in enthalpy (\(\Delta H^\circ\)) is -28.4 kJ and the change in entropy (\(\Delta S^\circ\)) is -87.9 J/K. Assuming these values change very little with temperature, the task is to determine at what temperature the reaction changes from nonspontaneous to spontaneous. ### Calculate the Transition Temperature \[ T = \] ### Determine Reaction Spontaneity Is the reaction in the forward direction spontaneous at temperatures greater than or less than the calculated temperature? - ○ less than - ○ greater than To find when the reaction becomes spontaneous, use the Gibbs free energy equation: \[ \Delta G = \Delta H - T \Delta S \] Set \(\Delta G\) to zero and solve for \(T\) to determine the transition temperature where the reaction changes from nonspontaneous to spontaneous. Choose the correct condition under which the reaction remains spontaneous.
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