Wednesday
September 17, 2014

Homework Help: Chemistry

Posted by Luc on Sunday, February 21, 2010 at 7:44am.

∆H⁰rxn, for the reaction of Ca(s) + 2H+(aq) -> Ca2+(aq) + H2(g) is -544 kJ/mol.

∆H⁰rxn, for the reaction of CaO(s) + 2H+(aq) -> Ca2+(aq) + H2O(l) is -193 kJ/mol.

Based on these results, what is the ∆Hf for CaO(s) [in kJ/mol] if the heat of formation of water is -286 kJ/mol?

Can someone please help me with this. I calculated all the given information above; however, I have no idea how to connect the dots and answer this question. Thank you!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

College Chemistry - The molar heat of reaction, H rxn, for the reaction of Ca(s...
chemistry - Calculate the temperature (K) at which the equation as written is at...
Chemistry - The molar heat of reaction, H rxn , for the reaction of Ca(s) + 2H+(...
Chemistry - Calculate Ecell (in volts) for a fuel cell that employs the ...
college chemistry - Carbon monoxide is toxic because it bonds much more strongly...
AP CHEMISTRY!!!! - Carbon monoxide reacts with oxygen to form carbon dioxide by ...
chemistry - If heat of reaction, Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) , is - 544 kJ/...
Chemistry - The standard internal energy change for a reaction can be symbolized...
Chemistry - A gas-phase reaction has Kp = 2.44 10 20 at 25 ◦ C. ...
Chemistry - Calculate ∆Hf /mol for propane, C3H8(g), given the ...

Search
Members