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2SO2(g) O2(g) 2SO3(g) 394 kJ
A mixture of platinum and vanadium(V) oxide may be used as a catalys reaction. The sulfur trioxide produced is then used to make sulfuric acid.
78 Determine tSheamapmleouRnetgeonftseQneuregsytiorenlseased when 1.00 mole of sulfur t produced. [1]
79 Write the chemical formula for vanadium(V) oxide. [1]
80 On the labeled axes in your answer booklet, complete the potential energy di the forward reaction represented by this equation. [1]
P.S./Chem.–June ’13
[14]
June 2013 #79
Answer
V2O5
Explanation:
1. Write the correct symbols of vanadium
and oxygen.
2. Assign oxidation numbers. Use the
oxidation number +5 for vanadium. 3. Crisscross the oxidation numbers.
t r
a
213 © UNIT 6: MATH IN CHEMISTRY
