Use the Standard Reaction Enthalpies Given Below to Determine ΔH°_rxn

question 20

Multiple Choice

Use the standard reaction enthalpies given below to determine ΔH°_rxn for the following reaction:
2 S(s) + 3 O₂(g) → 2SO₃(g) ΔH°_rxn = ?
Given:
SO₂(g) → S(s) + O₂(g) ΔH°_rxn = +296.8 kJ
2 SO₂(g) + O₂(g) → 2 SO₃(g) ΔH°_rxn = -197.8 kJ

• A)-494.6 kJ
• B)-692.4 kJ
• C)-791.4 kJ
• D)-98.8 kJ
• E)-293.0 kJ

---

Definitions:

Race Crossover

A demographic phenomenon where the mortality rates of two different racial or ethnic groups cross over at certain ages.

Late Adulthood

A life stage characterized by aging and retirement, typically considered to begin around the age of 65.

Prefer to Age

The preference for aging in a certain way or environment, though not a common phrase, it suggests choices related to lifestyle in later life.

Actively Involved

Engaged in a process or activity with significant attention, effort, and participation.