T6hw question 22 - challenge
homework • unanswered
the enthalpy of atomization is the enthalpy required to convert a compound into gaseous monatomic atoms by breaking all the
bonds in the compound in a single step. use the table below to calculate a hexn for the formation of c h oh from c, h, and h. o
c2h4(8)
h2o(g)
c, h,oh(g)|
compound
ah atomization (kj/mol)
2253
927.2
3269
o
a
+88.8 kj/mol
o
b
+177.6 kj/mol
o
c
-88.8 kj/mol
o
d
177.6 kj/mol

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .