BITSAT 2016 Paper

Section: Chemistry

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Question : 70 of 150

Marks: +1, -0

Given

Reaction

Energy Change (in kJ)

Li(s)→Li(g)

161

Li(g)→Li+(g)

520

1

2

F2(g)→F(g)

77

F(g)+e−→F−(g)

(Electron gain enthalpy)

Li+(g)+F−(g)→LiF(s)

-1047

Li(s)+

1

2

F2(g)→LiF(s)

-617

Based on data provided, the value of electron gain enthalpy of fluorine would be :

–300kJmol–1
–350kJmol–1
–328kJmol–1
–228kJmol–1

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