Given the Following Reactions N₂ (G) + O₂ (G) →

question 143

Multiple Choice

Given the following reactions N₂ (g) + O₂ (g) → 2NO (g) ΔH = +180.7 kJ
2NO (g) + O₂ (g) → 2NO₂ (g) ΔH = -113.1 kJ
The enthalpy of reaction for
4NO (g) → 2NO₂ (g) + N₂ (g)
Is ________ kJ.

• A)67.6
• B)45.5
• C)-293.8
• D)-45.5
• E)293.8

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Definitions:

Cardinality Principle

A concept in mathematics education that the last number named when counting objects represents the total number of objects in the set.

Ascending-series Principle

A principle or method involving sequence or order that progresses from lower to higher, often used in contexts such as music, mathematics, and psychology.

Preoperational Stage

A stage in Jean Piaget's theory of cognitive development, occurring approximately between the ages of 2 and 7, characterized by symbolic thinking and egocentrism but a lack of operational logic.

Decenter

In Piaget’s terminology, to think simultaneously about several aspects of a situation.