inaccensa Full Member 15+ Year Member Joined Sep 5, 2008 Messages 511 Reaction score 1 Aug 15, 2009 #1 Members do not see this ad. 2AlCl3 (s)----> 2Al(s) + 3 Cl2 (g) delta H for AlCl3 at 25c = -164.2 kJ/mol What is the enthalpy of reaction?
Members do not see this ad. 2AlCl3 (s)----> 2Al(s) + 3 Cl2 (g) delta H for AlCl3 at 25c = -164.2 kJ/mol What is the enthalpy of reaction?
T thebillsfan Unseasoned Veteran 10+ Year Member Joined Dec 23, 2008 Messages 778 Reaction score 0 Aug 15, 2009 #2 since delta H for AlCl3 is negative, the enthalpy for the opposite reaction (the one youre asking about) is simply +164.2. That doesnt mean all decomp rxns have positive enthalpy, but this one does. Upvote 0 Downvote
since delta H for AlCl3 is negative, the enthalpy for the opposite reaction (the one youre asking about) is simply +164.2. That doesnt mean all decomp rxns have positive enthalpy, but this one does.