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Which has highest electron gain enthalpy between chlorine and fluorine and why?
Even though Fluorine has the highest electronegativity among all the elements and it should have the highest electron gain enthalpy among all the halogens but this is an exception and chlorine has higher electron gain enthalpy than Fluorine. The reason for this is that the size of Fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine. This makes incoming of another electron not very favourable. Even though fluorine has large negative electron gain enthalpy but for chlorine its even more negative.
Which element has the highest ionization rate Sodium aluminum calcium or phosphorus?
phosphorous has highest ionization enthalpy because along the period ionization will increase.
Why the reaction between hydrogen and chlorine is very slow at room temperature?
The reaction between hydrogen and chlorine is slow at room temperature because it has a high activation energy barrier that needs to be overcome for the reaction to occur. This barrier is attributed to the stability of the chlorine molecule and the absence of external energy sources to provide the necessary activation energy at room temperature.
Why is the standard enthalpy change of neutralization between hydrofluoric acid and sodium hydroxide more negative than usual?
The standard enthalpy change of neutralization between hydrofluoric acid and sodium hydroxide is more negative because hydrofluoric acid is a weak acid, so it undergoes complete ionization during neutralization. This means it releases more heat compared to a strong acid. Additionally, the reaction between hydrofluoric acid and sodium hydroxide forms water and a salt, which are both strong electrolytes, leading to a more exothermic reaction.
What is the enthalpy of ammonium chloride?
The enthalpy of formation of ammonium chloride is -315.4 kJ/mol.
What is the difference between electron affinity and electron gain enthalpy?
Electron affinity is the energy released when an atom gains an electron to form a negative ion, while electron gain enthalpy is the enthalpy change accompanying the addition of an electron to a gaseous atom. Electron affinity is a specific term used in the context of forming an ion, while electron gain enthalpy is a general term for the enthalpy change associated with gaining an electron.
What is the Definition of ionization enthalpy?
IONIZATION enthalpy is the amount of energy to lose electron from its outer most shell .
What element are most reactive on the table?
Sodium, Potassium, and other alkali metals are very reactive due to the low ionization enthalpy. Flourine, Chlorine and other halogens are very reactive due to the high negative electron gain enthalpy.
What elements on the table are most reactive why?
Sodium, Potassium, and other alkali metals are very reactive due to the low ionization enthalpy. Flourine, Chlorine and other halogens are very reactive due to the high negative electron gain enthalpy.
The value 349 kJ mol represents chlorine's?
The value 349 kJ/mol represents chlorine's enthalpy of atomization, which is the energy required to convert one mole of gaseous chlorine atoms into individual gaseous chlorine atoms. It reflects the strength of the bonds within the chlorine molecule.
What is electron gen enthalpy?
Electron Gain Enthalpy is the amount of Energy released when an isolated gaseous atom accepts an electron to become a monovalent gaseous anion.For Example:Atom(gas) +Electron ---->Anion(gas) +Energy(Electron Gain Enthalpy)
What is the significance of isolated gaseous atom while defining the ionization enthalpy?
isolated gaseous atoms ionization enthalpy is taken as reference value and its required to compare this values to various ions of this elements and to compare this values with various elements
How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium but its second ionization enthalpy is higher than that of magnesium?
Sodium has only one valence electron, and when that is donated to some other atom, the remaining ion has a noble gas configuration that is highly stable. Disrupting that by another ionization requires much energy. Magnesium has two valence electrons; therefore the second is almost as easy to donate as the first. The third ionization enthalpy of magnesium would be very high.
Which has highest electron gain enthalpy between chlorine and fluorine and why?
Even though Fluorine has the highest electronegativity among all the elements and it should have the highest electron gain enthalpy among all the halogens but this is an exception and chlorine has higher electron gain enthalpy than Fluorine. The reason for this is that the size of Fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine. This makes incoming of another electron not very favourable. Even though fluorine has large negative electron gain enthalpy but for chlorine its even more negative.
Name the elements with highest ionisation enthalpy?
The elements with the highest ionization enthalpy are helium, neon, and argon. These noble gases have full valence electron shells and are very stable, making it difficult to remove an electron from them.
Electron affinity is the enthalpy change during acquring or losing electrons?
is the amount of energy required to detach an electron from a singly charged negetive ion. X- ------> X + é
Why does bromine have lower bond enthalpy energy than chlorine?
Bromine has lower bond enthalpy energy than chlorine because bromine has larger atoms with more electron shielding, which results in weaker bonding forces. Additionally, bromine has a longer bond length compared to chlorine, which contributes to a lower bond enthalpy energy.
