Calculate the Standard Enthalpy Change for the Reaction 2C₈H₁₈(l)

question 100

Multiple Choice

Calculate the standard enthalpy change for the reaction 2C₈H₁₈(l) + 21O₂(g) → 8CO(g) + 8CO₂(g) + 18H₂O(l) . Given:
2C₈H₁₈(l) + 25O₂(g) → 16CO₂(g) + 18H₂O(l) ΔH° = -11,020. kJ/mol
2CO(g) + O₂(g) → 2CO₂(g) ΔH° = -566.0 kJ/mol

• A) 1.0454 × 10⁴ kJ/mol
• B) -8756 kJ/mol
• C) 1.1586 × 10⁴ kJ/mol
• D) -6492 kJ/mol
• E) -1.0454 × 10⁴ kJ/mol

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Definitions:

Fundamental Power Frequency

The primary frequency at which an electrical system is designed to operate, typically 50 or 60 Hz in most regions.

Harmonics

Oscillations at integer multiples of the fundamental frequency in an electrical signal, often considered unwanted distortions.

True-RMS Ammeter

An instrument that accurately measures the current in a circuit by calculating the root mean square of the waveform, suitable for both AC and non-sinusoidal conditions.

Harmonic Distortion

A distortion that occurs in a signal when there are frequencies in the output that are integer multiples of the fundamental frequency, affecting the signal's waveform.