In Which of the Reactions Below Is ΔH an Enthalpy

question 22

Multiple Choice

In which of the reactions below is ΔH an enthalpy of formation?

• A) S₈(s)+ 8O₂(g)→ 8SO₂(g)
• B) N₂(g)+ O₂(g)→ 2NO(g)
• C) H₂(g)+ Cl₂(g)+ 4O₂(g)→ 2HClO₄(l)
• D) Cu(s)+ 1/2I₂(s)→ CuI(s)
• E) CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g)

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Definitions:

Frequency Distribution

A mathematical function showing the number of instances in which a variable attains values within specified intervals.

Standard Distribution Table

A mathematical table used for finding areas under the curve of the standard normal distribution, often used in statistics.

Rental Price

The amount of money charged to rent a property, such as an apartment or house, typically billed on a monthly basis.

Causal Relationship

When one variable causes a change in another variable.