The Value of Δ_fG° at 400

question 97

Multiple Choice

The value of Δ_fG° at 400.0 °C for the formation of calcium chloride from its constituent elements, Ca(s) + (g) → (s)
Is ________ kJ mol^-1. At 25.0 °C for this reaction, Δ_fH° is -795.8 kJ mol^-1, Δ_fG° is -748.1 kJ mol^-1, and is

• A) -731.9
• B) -903.3
• C) 1.07 × 10⁵
• D) 6.31 × 10⁴
• E) -688.3

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Definitions:

Actuate

To put into motion or action, typically referring to the operation of a mechanical device or system.

Applied Voltage

The voltage that is applied across a component or circuit, initiating its operation or influencing its performance.

Delay Relays

Delay relays are electromechanical or solid-state devices designed to delay the activation of an electrical circuit for a specified period, used in various timing and control applications.

Operating States

The various conditions or modes in which a device or system can exist, such as on, off, standby, or fault.