ap thermo test

balance equations! just because the question doesn't say to check....!
q abs = NEGATIVE q rel DRAW!
dE does NOT require and end around nRT calc....ONLY EVER do that if dH is needed from a bomb
in Hess LAW diagrams ALWAYS USE AND LABEL UNITS!!!!]
Hf is NOT Hcomb ever
explanation requires you to answer why....there is no Cl2 GAS in a SALT!!!
the BIGGEST problem is not understanding basic stoichiometry of moles of a given substance versus moles of REACTION!