Given the Following Thermochemical Equations and Their Corresponding Enthalpies

question 54

Multiple Choice

Given the following thermochemical equations and their corresponding enthalpies:
2 C₂ H₂ (g) + 5 O₂(g) 4 CO₂ (g) + 2 H₂ O ( ) D H = - 2601 kJ C₈ H₈ ( ) + 10 O₂(g) 8 CO₂ (g) + 4 H₂ O ( ) D H = - 4393 kJ What is the enthalpy change for the following reaction?
4 C₂ H₂ (g) C₈ H₈ ( ) D H = ?

• A) - 1792 kJ
• B) - 809 kJ
• C) - 6994 kJ
• D) - 9595 kJ
• E) none of these

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Definitions:

Fiedler's Contingency Model

A leadership theory proposing that effective leadership is dependent on the match between a leader's style and the degree to which the situation gives control to the leader.

Least-preferred Co-worker Scale

The Least-preferred Co-worker Scale is a psychological tool used to measure an individual’s leadership style based on their attitudes toward the least preferred co-worker.

Leadership Style

A recurring pattern of behaviours exhibited by a leader.

Laissez-faire Style

A leadership approach where subordinates are given autonomy in their decision-making and minimal direct supervision is provided.