atomic mass 195.08 -Š mol electronegativity 2.28 kJ mol kJ mol kJ mol electron a

Question

atomic mass 195.08 -Š mol electronegativity 2.28 kJ mol kJ mol kJ mol electron affinity205.3 ionization energy870 heat of fusion 20. You may find additional useful data in the ALEKS Data tab. release absorb Can't be decided with the data given yes no Does the following reaction absorb or release energy? (1) Pt(g)+ e- > Pt (s) Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1) | kJ/mol release absorb Can't be decided with the data given yes no Does the following reaction absorb or release energy? (2) Pt' (g)+e Pt(s) Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2) kJ / mol Explanation Check

Explanation / Answer

a) Energy released ,when an electron is added to a neutral atom energy is released

b) the energy needed to add an electron to an atom to form a negative ion is called electron affinity so yes

C) -205.3 KJ / mol

d) Energy is released, ionization energy is the energy needed to remove a valence electron to form a cathion like

X + energy = X+ + e-

in our particular case we have

Pt+ + e- == Pt (+energy)

e) yes

f) -870 KJ / mol, we have the inverted equation than that described for ionization energy

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