8. Thermochemistry
Hess's Law
18PRACTICE PROBLEM
Consider the dissolution of CaCl2. Determine ΔH for the reverse reaction.
CaCl2(s) → Ca2+(aq) + 2 Cl–(aq) ΔH = –81.5 kJ/mol
Consider the dissolution of CaCl2. Determine ΔH for the reverse reaction.
CaCl2(s) → Ca2+(aq) + 2 Cl–(aq) ΔH = –81.5 kJ/mol
ANSWERS OPTIONS
A
–40.75 kJ/mol
B
81.5 kJ/mol
C
163 kJ/mol
D
40.75 kJ/mol