Calculate the Energy Change for the Formation of CaF₂(s)from Its

question 21

Multiple Choice

Calculate the energy change for the formation of CaF₂(s) from its elements in their standard states and the following information: Ca(s) + F₂(g) → CaF₂(s) ?
Ca(s) → Ca(g) +179.3 kJ/mol
Ca(g) → Ca⁺(g) + e^- +589.9 kJ/mol
Ca⁺(g) → Ca²⁺(g) + e^- +1145 kJ/mol
1/2 F₂(g) → F(g) +79.0 kJ/mol
F(g) + e^- → F^-(g) -328.0 kJ/mol
CaF₂(s) → Ca²⁺(g) + 2 F^-(g) +2630 kJ/mol

• A)+4046 kJ/mol
• B)-965 kJ/mol
• C)-1214 kJ/mol
• D)-3286 kJ/mol

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Definitions:

Thalamus

A critical brain structure that acts as a relay station, directing sensory signals to the appropriate areas of the brain for processing.

Forebrain

The front section of the brain, encompassing the cerebral hemispheres, thalamus, and hypothalamus, plays a crucial role in advanced cognitive and behavioral activities.

Sensory Information

Data received from the environment through the senses like sight, hearing, smell, taste, and touch, which is then interpreted by the brain.

Spinal Cord

A slender, elongated structure composed of nerve tissue that stretches from the medulla oblongata in the brainstem to the lumbar segment of the spine.