At Constant Pressure,the Combustion of 20 $\mathrm { mol } ^ { - 1 }$

question 23

Multiple Choice

At constant pressure,the combustion of 20.0 g of C₂H₆(g) releases 1036 kJ of heat.What is ?H for the reaction given below?
2C₂H₆(g) + 7O₂(g) ? 4CO₂(g) + 6H₂O(l)

• A)-173 kJ \(\mathrm { mol } ^ { - 1 }\)
• B)-779 kJ \(\mathrm { mol } ^ { - 1 }\)
• C)-1560 kJ \(\mathrm { mol } ^ { - 1 }\)
• D)-3120 kJ \(\mathrm { mol } ^ { - 1 }\)

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Definitions:

Dams

Structures built across rivers or streams to control the flow of water for the purposes of water storage, flood prevention, irrigation, and hydroelectric power generation.

Wetlands

Ecosystems characterized by the presence of standing water, which support a diverse range of plant and animal life and provide critical ecological services.

Southern Ontario

A region of the Canadian province of Ontario, located in the southernmost part of the country, known for its dense population and significant industrial activity.

Wetlands

Areas where water covers the soil, either year-round or for varying periods of time throughout the year, including marshes, swamps, and bogs, important for biodiversity and flood control.