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if H and S are both negative
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How will the temperature affect the spontaneity of a reaction with positive h and s?
A high temperature will make it spontaneous.
Under what conditions will a low temperature make a reaction spontaneous apex?
A low temperature can make a reaction spontaneous when it is exothermic, meaning it releases heat, and has a negative change in enthalpy (ΔH < 0). Additionally, if the reaction has a positive change in entropy (ΔS > 0), the Gibbs free energy change (ΔG = ΔH - TΔS) will be negative at low temperatures, favoring spontaneity. Conversely, if the reaction is endothermic (ΔH > 0) and has a negative entropy change (ΔS < 0), it will not be spontaneous at low temperatures.
When could a high temperature make a reaction that was non spontaneous at a low temperature spontaneous?
A high temperature can make a reaction that is non-spontaneous at low temperatures spontaneous if the reaction has a positive entropy change (ΔS > 0) and a negative enthalpy change (ΔH < 0). According to the Gibbs free energy equation (ΔG = ΔH - TΔS), increasing the temperature (T) can make the term -TΔS more significant, potentially turning ΔG negative and indicating spontaneity. This is particularly relevant for reactions that are endothermic (positive ΔH) but have a large increase in disorder.
On what conditions does a spontaneous reaction become spontaneous?
For some non-spontaneous reactions, you can change the temperature. For other non-spontaneous reactions, there is nothing you can do to make it spontaneous. Nature favors reactions that increase a system's entropy (disorder) and nature favors reactions that are exothermic (they release enthalpy). Any reaction that does both of these things is spontaneous at all temperatures. Any reaction that does neither of these things is never spontaneous. As far as this question is concerned, the interesting reactions are endothermic reactions that increase entropy and exothermic reactions that decrease entropy. Whether these reactions are spontaneous depends on the temperature. The first variety (endothermic, increase entropy) will be spontaneous at high temperatures; the second (exothermic, decrease entropy) will be spontaneous at low temperatures. To find the temperature at which a reaction becomes spontaneous, one may apply the Gibbs equation: DG = DH - TDS where capital Ds stand for the Greek capital delta.
How does temperature affect the spontaneity of an reaction?
Temperature can significantly influence the spontaneity of a reaction, as described by Gibbs free energy (ΔG = ΔH - TΔS). An increase in temperature can make a reaction more spontaneous if it has a positive entropy change (ΔS > 0), as the TΔS term becomes larger, potentially lowering ΔG. Conversely, for reactions with a negative entropy change (ΔS < 0), higher temperatures can render them non-spontaneous by increasing ΔG. Thus, temperature acts as a critical factor in determining the spontaneity of a reaction based on the interplay between enthalpy and entropy.
Under what conditions will a low temperature make a reaction spontaneous?
if H and S are both negative
How will the temperature affect the spontaneity of a reaction with positive h and s?
A high temperature will make it spontaneous.
Under what conditions will a low temperature make a reaction spontaneous apex?
A low temperature can make a reaction spontaneous when it is exothermic, meaning it releases heat, and has a negative change in enthalpy (ΔH < 0). Additionally, if the reaction has a positive change in entropy (ΔS > 0), the Gibbs free energy change (ΔG = ΔH - TΔS) will be negative at low temperatures, favoring spontaneity. Conversely, if the reaction is endothermic (ΔH > 0) and has a negative entropy change (ΔS < 0), it will not be spontaneous at low temperatures.
When Could A High Temperature Make A Reaction That Was Nonspontaneous At Low Temperature Spontaneous?
A high temperature can make a nonspontaneous reaction spontaneous by providing enough energy to overcome the activation energy barrier, allowing the reaction to proceed. At low temperatures, the kinetic energy of the molecules may not be sufficient for them to react, but increasing the temperature can provide the necessary energy for the reaction to occur spontaneously.
When could a high temperature make a reaction that was non spontaneous at a low temperature spontaneous?
A high temperature can make a reaction that is non-spontaneous at low temperatures spontaneous if the reaction has a positive entropy change (ΔS > 0) and a negative enthalpy change (ΔH < 0). According to the Gibbs free energy equation (ΔG = ΔH - TΔS), increasing the temperature (T) can make the term -TΔS more significant, potentially turning ΔG negative and indicating spontaneity. This is particularly relevant for reactions that are endothermic (positive ΔH) but have a large increase in disorder.
According to the Gibbs free energy equation G H - T S when could a high temperature make a reaction that was nonspontaneous at low temperature spontaneous?
A high temperature could make a reaction spontaneous that was nonspontaneous at low temperature when the increase in entropy due to the reaction outweighs the increase in enthalpy. At higher temperatures, the TΔS term in the Gibbs free energy equation becomes more dominant, leading to a positive ΔG becoming negative, thus making the reaction spontaneous.
On what conditions does a spontaneous reaction become spontaneous?
For some non-spontaneous reactions, you can change the temperature. For other non-spontaneous reactions, there is nothing you can do to make it spontaneous. Nature favors reactions that increase a system's entropy (disorder) and nature favors reactions that are exothermic (they release enthalpy). Any reaction that does both of these things is spontaneous at all temperatures. Any reaction that does neither of these things is never spontaneous. As far as this question is concerned, the interesting reactions are endothermic reactions that increase entropy and exothermic reactions that decrease entropy. Whether these reactions are spontaneous depends on the temperature. The first variety (endothermic, increase entropy) will be spontaneous at high temperatures; the second (exothermic, decrease entropy) will be spontaneous at low temperatures. To find the temperature at which a reaction becomes spontaneous, one may apply the Gibbs equation: DG = DH - TDS where capital Ds stand for the Greek capital delta.
What factor might make an endothermic reaction spontaneous?
An endothermic reaction can be spontaneous if the increase in entropy (disorder) of the system is large enough to overcome the energy input required for the reaction to occur.
How will temperature affect the spontaneity of reaction with positive H and S?
A high temperature will make it spontaneous.
How does temperature affect the spontaneity of an reaction?
Temperature can significantly influence the spontaneity of a reaction, as described by Gibbs free energy (ΔG = ΔH - TΔS). An increase in temperature can make a reaction more spontaneous if it has a positive entropy change (ΔS > 0), as the TΔS term becomes larger, potentially lowering ΔG. Conversely, for reactions with a negative entropy change (ΔS < 0), higher temperatures can render them non-spontaneous by increasing ΔG. Thus, temperature acts as a critical factor in determining the spontaneity of a reaction based on the interplay between enthalpy and entropy.
What is the reaction in a fuel cell spontaneous and non spontaneous?
Spontaneous ...Happens all by itself; typically unpredictableNon-spontaneous...You have to do something to make it happen.
How do you make a sentence by using the word Spontaneous?
There was a spontaneous reaction of elation when the local lottery syndicate won one million pounds.
