Calculate the Enthalpy of Reaction for H₂(g) + C₂H₄(g) $\rarr$ C₂H₆(g) $\Delta$

question 48

Multiple Choice

Calculate the enthalpy of reaction for H₂(g) + C₂H₄(g) $\rarr$ C₂H₆(g) .[ $\Delta$ H ^$\circ$ _f(C₂H₄(g) ) = 52.3 kJ/mol; $\Delta$ H ^$\circ$ _f(C₂H₆(g) ) = -84.7 kJ/mol]

• A) -117 kJ/mol
• B) -127 kJ/mol
• C) -137 kJ/mol
• D) -147 kJ/mol
• E) None of the above

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Definitions:

Geometric Mean

The nth root of the product of n numbers, used to calculate average rates of return or growth over time.

Closing Stock Price

The final price at which a stock is traded during a trading session on a stock exchange.

Mean

The average of a set of values, calculated by adding all the numbers together and dividing by the count of the values.

Standard Deviation

A quantitative assessment that determines the range of difference or dispersion in a collection of data.