For Which of the Following Reaction(s) Is the Enthalpy Change

question 51

Multiple Choice

For which of the following reaction(s) is the enthalpy change for the reaction not equal to ΔH°_f of the product?
I. 2H(g) → H₂(g)
II. H₂(g) + O₂(g) → H₂O₂(l)
III. H₂O(l) + O(g) → H₂O₂(l)

• A) I and III
• B) III only
• C) II and III
• D) II only
• E) I only

---

Definitions:

Herfindahl Index

A measure of market concentration that sums the squares of the market share percentages of all firms within the industry, used to assess the level of competition.

Oligopolistic

Pertains to a market structure characterized by a small number of firms dominating the market, leading to limited competition and significant control over market prices.

Equal Percentage

A concept referring to an identical rate of change or proportionate adjustment applied across different quantities or values.

Five-Firm Industry

A market structure characterized by the dominance of the top five firms, often used as a concentration ratio to measure market competitiveness.