Calculate the Lattice Enthalpy of Potassium Fluoride from the Following $\Delta$

question 172

Multiple Choice

Calculate the lattice enthalpy of potassium fluoride from the following data.
Enthalpy of formation of K(g) : +89 kJ.mol^-1
First ionization energy of K(g) : +418 kJ.mol^-1
Enthalpy of formation of F(g) : +79 kJ.mol^-1
Electron affinity of F(g) : +328 ( $\Delta$ H = kJ.mol^-1
Enthalpy of formation of KF(s) : -567 kJ.mol^-1

• A) 1481 kJ.mol^-1
• B) 825 kJ.mol^-1
• C) 904 kJ.mol^-1
• D) 497 kJ.mol^-1
• E) 347 kJ.mol^-1

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Definitions:

Aerobic

Exercise that requires the consumption of oxygen to fuel the body's muscular activity, such as running or swimming, improving cardiovascular health.

Isometric

Pertaining to exercises or contractions where muscle length remains the same while muscle tension increases, often used in fitness and physical therapy.

Cardiovascular Health

Pertains to the overall condition of the heart and blood vessels, underlining the importance of preventing heart diseases and maintaining function.

Aerobic

Pertaining to or involving oxygen; aerobic exercise refers to activities that increase oxygen circulation to improve endurance and cardiovascular health.