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What kind of reaction occurs when the entropy change of an endothermic reaction is negative?
The reaction is exothermic
Select all the conditions below that are most likely to result in a spontaneous chemical reaction or process?
Exothermic reaction Decrease in entropy Increase in entropy Positive change in free energy Negative change in free energy
What is criteria for a spontaneous process to be called so?
A spontaneous process is one that occurs without the need for external influence, such as the input of energy. Another way of defining it is that a spontaneous process increases the entropy (disorder) of a system. This means that the process favors the direction in which the system becomes more disordered or random.
Which o the following would most likely be spontaneous?
To determine which process would be most likely spontaneous, we typically consider factors like changes in enthalpy and entropy. A process that results in a decrease in enthalpy (exothermic) and an increase in entropy (disorder) is generally spontaneous. For example, the melting of ice at room temperature is spontaneous because it absorbs heat (endothermic) but results in a significant increase in entropy. Without specific options provided, it's essential to assess these thermodynamic principles to identify spontaneous processes.
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.
Why does the entropy of the universe increase for spontaneous processes?
The entropy of the universe increases for spontaneous processes because the second law of thermodynamics states that in any spontaneous process, the overall entropy of a closed system will always increase over time. This is because the natural tendency of systems is to move towards a state of higher disorder and randomness, leading to an increase in entropy.
Is an increase in entropy of a system sufficient to make a process spontaneous?
Yes, an increase in entropy of a system is sufficient to make a process spontaneous.
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.
Can entropy decrease during a process?
in general entropy will not decrease in a spontaneous process since spontaneous process are all irreversible ones. entropy can be reversed only through an reversible process by an ideal engine but it is impossible to create such an engine by violating second law of thermodynamics. hence entropy cannot be decreased practically
Does the entropy of the universe increase when a system undergoes a reversible process?
Yes, the entropy of the universe increases when a system undergoes a reversible process.
What kind of reaction occurs when the entropy change of an endothermic reaction is negative?
The reaction is exothermic
What conditions must be met for a spontaneous process to occur?
For a spontaneous process to occur, the conditions must involve an increase in entropy and a decrease in free energy.
How does the second law of thermodynamics relate to crystal formation?
Short answer: the 2nd law of thermodynamics applies only to closed systems, and the only truly closed system is presumably the entire universe (if even that). Crystals always form in the context of a larger system providing energy, meaning that entropy increases elsewhere, proportionate to the decrease of entropy represented by the crystal formation. Here is a somewhat more in-depth answer: http://www.newton.dep.anl.gov/newton/askasci/1993/chem/CHEM047.HTM
Select all the conditions below that are most likely to result in a spontaneous chemical reaction or process?
Exothermic reaction Decrease in entropy Increase in entropy Positive change in free energy Negative change in free energy
Is the Uniform mixing of bromine vapor and nitrogen gas a spontaneous or non spontaneous reaction?
The uniform mixing of bromine vapor and nitrogen gas is a non-spontaneous process because it requires an input of energy to overcome the entropy-driven tendency of the two components to remain separated due to differences in their properties.
What is criteria for a spontaneous process to be called so?
A spontaneous process is one that occurs without the need for external influence, such as the input of energy. Another way of defining it is that a spontaneous process increases the entropy (disorder) of a system. This means that the process favors the direction in which the system becomes more disordered or random.
Why are all spontaneous processes irreversible?
Spontaneous processes are irreversible because they involve an increase in entropy, or disorder, in the system. This increase in entropy leads to a loss of energy that cannot be fully recovered, making the process irreversible.
