The Heat Combustion of Acetylene, C₂H₂(g), at 25°C, Is -1299

question 61

Multiple Choice

The heat combustion of acetylene, C₂H₂(g) , at 25°C, is -1299 kJ/mol. At this temperature, ΔH°_f values for CO₂(g) and H₂O(l) are -393 and -286 kJ/mol, respectively. Calculate ΔH°_f for acetylene.

• A) 227 kJ/mol
• B) -625 kJ/mol
• C) 625 kJ/mol
• D) 2376 kJ/mol
• E) none of these

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Definitions:

Marginal Revenue Product

This term refers to the additional revenue generated from using one more unit of input, illustrating the contribution of that unit to the total output's revenue.

Last Unit

Refers to the final item or unit produced or consumed, which can be significant in determining the marginal cost or utility.

Labor Employed

The total number of workers who are currently hired and working in a given sector or economy.

Marginal Resource Cost

The cost of producing one additional unit of a resource or input.