Calculate the Lattice Energy of Sodium Fluoride from the Following $\frac { 1 } { 2 }$

question 114

Multiple Choice

Calculate the lattice energy of sodium fluoride from the following data:
Ionization energy of Na: 496 kJ/mol
Electron affinity of F: -328 kJ/mol
Energy to vaporize Na: 108 kJ/mol
F₂ bond energy: 160 kJ/mol
Energy change for the reaction:
Na(s) + $\frac { 1 } { 2 }$
F₂(g) $\rightarrow$ NaF(s) ; $\Delta$ H = -575 kJ

• A) 931 kJ/mol
• B) -931 kJ/mol
• C) -1011 kJ/mol
• D) 1,011 kJ/mol
• E) -851 kJ/mol

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Definitions:

Thought Patterns

The habitual ways in which one tends to think or process information, which can influence behavior and emotions.

Psychoanalysis

A therapeutic technique and theory of psychological disorders, emphasizing unconscious conflicts and childhood experiences.

Cognitive Therapies

Psychological treatments that focus on changing faulty or irrational thinking patterns, beliefs, and attitudes.

Systematic Desensitization

A therapeutic method used to cure phobias and other behavior problems involving anxiety, by gradual exposure to the feared object or situation in a controlled environment.