How do we formulate #DeltaH_f^@# for #"carbon tetrachloride"#, and #HCl#?

1 Answer
Sep 2, 2017

Answer:

We can quote #DeltaH_f^@#, the enthalpy change of formation.....

Explanation:

And #DeltaH_f^@# represents the enthalpy associated with formation of one mole of substance from its elements in their standard states under standard conditions, i.e. for #"CCl"_4#:

#C(s) + 2Cl_2(g)rarr"CCl"_4(l) #

And #DeltaH_"rxn"^@-=DeltaH_f^@("CCl"_4)#

And likewise......

#1/2H_2(g)+1/2Cl_2(g)rarrHCl(g)#

And #DeltaH_"rxn"^@-=DeltaH_f^@(HCl)#