AP Chemistry
6.9 Hess’s Law
A student determines the standard enthalpy change, \(\Delta H^\circ\), for the conversion of graphite to diamond:
\[\text{C(s, graphite)} \rightarrow \text{C(s, diamond)}\]
The student is provided with the following standard enthalpies of combustion:
\[\text{C(s, graphite)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -393.5 \text{ kJ/mol}_{rxn}\]
\[\text{C(s, diamond)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -395.4 \text{ kJ/mol}_{rxn}\]
Based on these data, what is the value of \(\Delta H^\circ\) for the conversion of graphite to diamond?
\[\text{C(s, graphite)} \rightarrow \text{C(s, diamond)}\]
The student is provided with the following standard enthalpies of combustion:
\[\text{C(s, graphite)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -393.5 \text{ kJ/mol}_{rxn}\]
\[\text{C(s, diamond)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -395.4 \text{ kJ/mol}_{rxn}\]
Based on these data, what is the value of \(\Delta H^\circ\) for the conversion of graphite to diamond?
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