If the Complete Consumption of 10

question 11

Multiple Choice

If the complete consumption of 10.3 g of C₂H₆ liberates -534.4 kJ of heat energy at constant pressure and 25°C,what is Δ_rH° for the following reaction 2C₂H₆(g) + 7O₂(g) → 4CO₂(g) + H₂O(l)
?

• A) -3120 kJ/mol-rxn
• B) -1560 kJ/mol-rxn
• C) -366 kJ/mol-rxn
• D) -183 kJ/mol-rxn
• E) -785 kJ/mol-rxn

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Definitions:

Tranquilizer

A type of psychotropic medication used to reduce tension or anxiety, often by depressing nervous system activity.

Depressants

Depressants are substances that reduce the functioning of the central nervous system, often resulting in a sense of relaxation or drowsiness.

Stimulants

Substances that increase activity in the brain and body, resulting in increased alertness, attention, and energy.

Central-Nervous-System Activity

Refers to the processes and actions coordinated by the brain and spinal cord that include sensory information processing and triggering muscle movements.