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Default Chemistry - Electron Affinity

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Calculate the electron affinity in kJ/mol for X in the hypothetical ionic compound MX from the information given below.
IE1(M) = 540 kJ/mol
M(s) => M(g) ΔHo = 78.5 kJ/mol
ΔHof(MX) = -198.7 kJ/mol
X2(g) => 2X(g) ΔH = 213 kJ
ΔHlattice (MX) = -726 kJ/mol
IE1 (X) = 271 kJ/mol

Herlp. I don't understand how to Calculate the electron affinity, I just thought it was a trend we were suppose to know and look at a table ;_;.
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What is ELECTRON AFFINITY IN CHEMISTRY? This thread Refback 11-06-2011 05:51 PM
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