Table of Contents
- 1 Why is the second electron affinity ea2 of oxygen much more positive than the second electron affinity ea2 of sulfur?
- 2 Why sulfur has a lower electron affinity than oxygen?
- 3 Why the second affinity of oxygen is negative?
- 4 Why is electron affinity of oxygen less than that of sulphur?
- 5 What is electron affinity?
Why is the second electron affinity ea2 of oxygen much more positive than the second electron affinity ea2 of sulfur?
Originally Answered: Why is the second electron affinity value of oxygen positive? Answer: Because you are bringing together two negative charges. There is energy released in bringing in the negative electron up to the positive nucleus.
Why is the 2nd electron affinity of oxygen positive?
The second electron affinity of oxygen is positive because after adding two electrons to its neutral oxygen atom, it attains a noble gas configuration. A noble gas configuration being most stable, releases energy to decrease the total energy of the configuration.
Which has greater electron affinity O or S?
The electronegativity of oxygen is greater than sulphur whereas the electron affinity of sulphur is greater than oxygen.
Why sulfur has a lower electron affinity than oxygen?
Q: The electron affinity of sulfur is greater than oxygen. Solution: This is because of smaller size of oxygen due to which it has got higher change density and thus electronic repulsion increases as it takes electron. So its Electron affinity is less than sulphur.
Why is EA2 always positive?
Because the electron is negatively charged you can see that there will be repulsion between the ion and the electron making the process endothermic, hence the positive value. The reason why it can happen is that this is just one energy change in a whole series which may occur during a reaction.
What is the second electron affinity of sulfur?
First electron affinity of sulphur is – 200 kJ mol -1 but second electron affinity is +565 kJ mol -1.
Why the second affinity of oxygen is negative?
There is energy released in bringing in the negative electron up to the positive nucleus. Because the electron is negatively charged you can see that there will be repulsion between the ion and the electron making the process endothermic, hence the positive value.
Which has more electron affinity in oxygen and sulphur?
This repulsion is higher for oxygen due to its small size and higher electron repulsion. So electron affinity is more in sulphur than oxygen.
What is second electron affinity?
The second electron affinity is the energy required to add an electron to each ion in 1 mole of gaseous 1- ions to produce 1 mole of gaseous 2- ions. This is more easily seen in symbol terms. X−(g)+e−→X−2(g) It is the energy needed to carry out this change per mole of X−.
Why is electron affinity of oxygen less than that of sulphur?
Solution: This is because of smaller size of oxygen due to which it has got higher change density and thus electronic repulsion increases as it takes electron. So its Electron affinity is less than sulphur.
Why is the interelectronic repulsion higher in oxygen than in Sulphur?
Best answer Due to small size and high electron density of oxygen compared to sulphur, interelectronic repulsion is higher in oxygen, resulting in less energy being released when an electron is added to oxygen, due to lesser stability after electron is added, which is due to the interelectronic repulsion in the small oxygen atom.
What is the electronegativity of fluorine equal to?
It is numerically equal to the negative of electron gain enthalpy. Although fluorine has the highest electronegativity, chlorine has the highest electron affinity and this is because the considerable repulsion in the tightly packed 2 p subshell of fluorine.
What is electron affinity?
The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion. It is the tendency of an atom to gain electron.