According to the Following Reaction, How Much Energy Is Required

question 124

Multiple Choice

According to the following reaction, how much energy is required to decompose 55.0 kg of Fe₃O₄? The molar mass of Fe₃O₄ is 231.55 g . Fe₃O₄(s) → 3Fe(s) + 2O₂(g) H° = +1118 kJ

• A) 1.10 × 10⁶ kJ
• B) 2.38 × 10² kJ
• C) 2.66 × 10⁵ kJ
• D) 1.12 × 10³ kJ
• E) 3.44 × 10⁴ kJ

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Definitions:

Chi-Square Value

A statistical measure used in tests of independence and goodness of fit, indicating how expectations compare to actual observed data.

Degrees of Freedom

Degrees of freedom refer to the number of independent values or quantities that can vary in an analysis without breaking any constraints.

Contingency Table

A data table that displays the frequency distribution of the variables.

Expected Frequency

In statistics, the predicted count of occurrences in a category of a contingency table based on probabilities derived from a theoretical distribution.