AP Chemistry
9.2 Absolute Entropy and Entropy Change
Hydrogen gas for industrial applications can be generated through the steam reforming of methane, represented by the balanced equation below.
\[ \text{CH}_4(g) + \text{H}_2\text{O}(g) \rightarrow \text{CO}(g) + 3\,\text{H}_2(g) \]
Based on the standard molar entropy values in the table above, what is the value of \(\Delta S^\circ_{rxn}\) for the reaction?
\[ \text{CH}_4(g) + \text{H}_2\text{O}(g) \rightarrow \text{CO}(g) + 3\,\text{H}_2(g) \]
| Substance | \(S^\circ\text{ (J}/(\text{mol}\cdot\text{K}))\) |
|---|---|
| \(\text{CH}_4(g)\) | \(186\) |
| \(\text{H}_2\text{O}(g)\) | \(189\) |
| \(\text{CO}(g)\) | \(198\) |
| \(\text{H}_2(g)\) | \(131\) |
Based on the standard molar entropy values in the table above, what is the value of \(\Delta S^\circ_{rxn}\) for the reaction?
Similar Questions
Tools for a 5
AP aligned mock tests to help you get a 5.
With grading, adaptive explanations, and more.
Find a Quiz
Find, solve, and grade every AP FRQ ever.
Find an FRQ
Stuck on AP Chemistry? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Find a Tutor
Learn AP Physics from scratch, quickly. This is the only course you'll need for the year.
A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee.
Explore the Course