8. Thermochemistry
Hess's Law
17PRACTICE PROBLEM
From the following data, calculate ΔH°rxn for the conversion of graphite to diamond.
C(s, graphite) + O2(g) → CO2(g) ΔH° = −393.5 kJ
C(s, diamond) + O2(g) → CO2(g) ΔH° = −395.4 kJ
From the following data, calculate ΔH°rxn for the conversion of graphite to diamond.
C(s, graphite) + O2(g) → CO2(g) ΔH° = −393.5 kJ
C(s, diamond) + O2(g) → CO2(g) ΔH° = −395.4 kJ
ANSWERS OPTIONS
A
1.9 kJ
B
788.9
C
–1.9 kJ
D
–788.9