0
Can a reaction that is endothermic with a decrease in entropy never occur spontaneously?
An endothermic reaction with a decrease in entropy may still occur spontaneously under certain conditions, particularly at high temperatures. Spontaneity is determined by the Gibbs free energy change (( \Delta G )), which combines enthalpy and entropy changes (( \Delta G = \Delta H - T \Delta S )). If the negative contribution from ( T \Delta S ) (where ( \Delta S ) is negative) is outweighed by a sufficiently large positive ( \Delta H ), the reaction may not be spontaneous. However, at lower temperatures, the reverse can be true, and such a reaction could be spontaneous.
What else can I help you with?
How can an endothermic reaction be spontaneous at room temperature?
An endothermic reaction can be spontaneous at room temperature if the increase in entropy of the system is large enough to overcome the energy input required for the reaction. This can happen if the products of the reaction have higher entropy than the reactants. As a result, the overall change in free energy can be negative even though the reaction is endothermic.
What happens to the entropy in the reaction?
Entropy increases. In a reaction comprised of sub-reactions, some sub-reactions may show a decrease in entropy but the entire reaction will show an increase of entropy. As an example, the formation of sugar molecules by living organisms is a process that shows decrease in entropy at the expense of the loss of entropy by the sun.
What are a set of conditions would result in a reaction that is unambiguously non-spontaneous?
endothermic, increasing entropy
What would cause entrophy to decrease in a reaction?
Entropy can decrease in a reaction when a system transitions from a more disordered state to a more ordered state, often observed in processes like crystallization or the formation of complex molecules from simpler ones. This decrease typically occurs in a local context, as the overall entropy of the universe still tends to increase according to the second law of thermodynamics. Additionally, external energy input can drive reactions that lead to a decrease in entropy within a system. However, it’s important to remember that while entropy may decrease locally, the total entropy of the combined system and surroundings will increase.
What does not describe a non spontaneous reaction?
A non-spontaneous reaction is typically characterized by requiring a continuous input of energy to proceed and does not occur naturally under standard conditions. It is not driven by an increase in entropy; instead, it often leads to a decrease in entropy. Additionally, non-spontaneous reactions do not have a negative Gibbs free energy change (ΔG > 0). Therefore, they do not occur spontaneously without external intervention.
How does an endothermic reaction change the entropy of the surroundings?
An endothermic reaction which absorbs heat from the surroundings decreases the entropy of the surroundings. This is because the surroundings lose thermal energy during the reaction, leading to a decrease in the disorder or randomness of the surroundings.
What type of chemical reaction cannot occurs spontaneously endothermic or exothermic?
An 'exothermic' reaction gives of energy, and an 'endothermic' reaction absorbs energy.
For which of reaction listed below will gibbs free energy always be positive?
Guys watch out the question, if your question end with positive then the answer will be An endothermic reaction that decreases in entropy. If the question end with negative then its An exothermic reaction that increases in entropy--APEX hope this help
What is the difference between a reaction that happens spontaneously and a reaction that doesn't?
The difference can be clarified by entropy (the second rule of thermodynamics).The reaction is more spontaneous with higher entropy, for the reactions that occur spontaneously the entropy is higher than for the ones that do not.
Chemical reactions that energy often occur spontaneously?
Chemical reactions that release energy often occur spontaneously because they lead to a decrease in the overall energy of the system. Exothermic reactions, which release heat energy, are usually spontaneous because they increase the randomness or entropy of the system, following the second law of thermodynamics. This decrease in energy and increase in entropy drive the reaction to proceed without the need for external energy input.
What happens when a reaction that is endothermic and results in an overall increase in entropy occurs?
When an endothermic reaction occurs and there is an overall increase in entropy, it means that energy is absorbed from the surroundings and the disorder or randomness of the system increases.
How can an endothermic reaction be spontaneous at room temperature?
An endothermic reaction can be spontaneous at room temperature if the increase in entropy of the system is large enough to overcome the energy input required for the reaction. This can happen if the products of the reaction have higher entropy than the reactants. As a result, the overall change in free energy can be negative even though the reaction is endothermic.
What happens to the entropy in the reaction?
Entropy increases. In a reaction comprised of sub-reactions, some sub-reactions may show a decrease in entropy but the entire reaction will show an increase of entropy. As an example, the formation of sugar molecules by living organisms is a process that shows decrease in entropy at the expense of the loss of entropy by the sun.
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.
What would happen to the entropy in the reaction 2O3 g 3O2 g?
It increases
Is Entrophy change in a system that undergoes a spontaneous process positive negative or zero?
Negative entropy is a process or chemical reaction proceeds spontaneously in the forward direction.Positive entropy is a process proceeds spontaneously in reverse.
What are a set of conditions would result in a reaction that is unambiguously non-spontaneous?
endothermic, increasing entropy
