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

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal