At Constant Pressure and 25 ^$\circ$ C,what Is $\Delta$ _rH ^$\circ$ for the Following Reaction
2C₂H₆(g)+ 7O₂(g)

question 11

Multiple Choice

At constant pressure and 25 ^$\circ$ C,what is $\Delta$ _rH ^$\circ$ for the following reaction
2C₂H₆(g) + 7O₂(g) $\to$ 4CO₂(g) + H₂O(l)
If the complete consumption of 89.4 g of C₂H₆ liberates -4638 kJ of heat energy?

• A) -3120 kJ/mol-rxn
• B) -1560 kJ/mol-rxn
• C) -27600 kJ/mol-rxn
• D) -13800 kJ/mol-rxn
• E) -787 kJ/mol-rxn

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Definitions:

Cubic Inches

A unit of volume measurement in the Imperial system, specifically measuring space in three dimensions, symbolized as in³.

Discriminant

A value derived from the coefficients of a quadratic equation that determines the nature and number of its solutions.

Real Solutions

Solutions to an equation that are real numbers, as opposed to complex or imaginary numbers.

Quadratic Formula

A formula that provides the solutions to a quadratic equation of the form ax^2 + bx + c = 0, with solutions given by (-b ± sqrt(b^2 - 4ac)) / (2a).