CHM 2045C Module Seven Sample Exam

 

Module Seven Part H: Standard Enthalpies of Formation 5 points

 

Calculate H for the reaction:

 

2 Al (s) + 1 Cr2O3 (s) 1 Al2O3 (s) + 2 Cr (s)

f (Al2O3 (s) ) = -1676 kJ/mol f (Cr2O3 (s) ) = - 1128 kJ/mol

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answer: -548 kJ