AP Chemistry : Hess' Law
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Example Questions
Example Question #1 : Hess' Law
Using the following data to calculate the enthalpy change in: 3 NO2(g) + H2O (l) -> 2 HNO3 (aq) + NO (g)
264 kJ/mol
-137 kJ/mol
68.5 kJ/mol
137 kJ/mol
-68.5 kJ/mol
-137 kJ/mol
Example Question #2 : Hess' Law
Using the following data to calculate the enthalpy change in: 2 CH4 (g) + 3 O2-> 2 CO (g) + 4 H2O (l)
-214.2 kJ/mol
214.2 kJ/mol
-418.4 kJ/mol
-1214 kJ/mol
418.4 kJ/mol
-1214 kJ/mol
Example Question #1 : Hess' Law
Using the following data to calculate the enthalpy change in: C4H10O(l) -> C4H8 (g) + H2O (g)
76 kJ/mol
-76 kJ/mol
-17 kJ/mol
152 kJ/mol
-152 kJ/mol
76 kJ/mol
Example Question #2 : Hess' Law
Using the following data to calculate the enthalpy change in: CaO (s) + H2O (l) -> Ca(OH)2 (aq)
-147 kJ/mol
-124 kJ/mol
147 kJ/mol
124 kJ/mol
-62 kJ/mol
-147 kJ/mol
Example Question #3 : Hess' Law
Using the following data to calculate the enthalpy change in: B2H6 (g) + 3 O2 (g) -> B2O3 (s) + 3 H2O (l)
2168 kJ/mol
-1084 kJ/mol
1084 kJ/mol
-2168 kJ/mol
3252 kJ/mol
-2168 kJ/mol
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