Page 313 - Chemistry eBook

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76 What is the melting point of the substance that collects at the bottom of the tank? [1]
Na3AlF6(l). [1]
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Na3AlF6(l). [1]
in this process, the rea
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forward reaction in the systemIncaretaseqthueilteibmrpieuramtures.hown below.
Base your answers to questions 78 through 80 on the information below and on your knowledge of chemistry. 2SOIncr(ega)se􏰀theOcon(cgen)tr􏰁atio2n SofOthe(hgy)dr􏰀oge3n9ga4s iknJthe tube.
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One process used to manufacture sulfuric acid is called the contact process. One step 73 [1] Allow 1 credit. Acceptable responses include, but are not limited to:
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One process used to manGurfinadcthuermeetsaul olfxiudreitco iancriedaseisitscsaulrlfeacde atrheae. contact process. One step
A mixture of platinum and vanadium(V) oxide may be used as a catalyst for this
in this process, the reaction between sulfur dioxide and oxygen, is represented by the
reaction. The sulfur trioxide produced is then used to make sulfuric acid.
forward reaction in the system at equilibrium shown below.
74 [1] Allow 1 credit. Acceptable responses include, but are not limited to:
2SOBot(hgs)am􏰀pleOs ha(vge)th􏰁e sam2Se cOhem(gic)al􏰀pro3pe9r4tiesk.J
78 Determine the amount o2f energy2 released w3hen 1.00 mole of sulfur trioxide is
A mixture of platinum and vanadium(V) oxide may be used as a catalyst for this 75 [1] Allow 1 credit. Acceptable responses include, but are not limited to:
produced. [1]
reaction. The sulfur trioxide produced is then used to make sulfuric acid. 79 Write the chemical formualuamfionurmvoaxnidaedium(V) oxide. [1]
78 Determine the amount of energy released when 1.00 mole of sulfur trioxide is 80 pOrnodthueceldab. el[e1d] a76xe[s1]inAlyloowu1rcraendistwforer93b3 oKo. klet, complete the potential energy diagram for
the forward reaction represented by this equation. [1]
77 [1] Allow 1 credit. Acceptable responses include, but are not limited to: 79 Write the chemical formula for vanadium(V) oxide. [1]
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the potential energy diagram for
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, is represented by the
P.S./Chem.–June ’13 June 2 [14]
The density of the aluminum is greater than the density of the Al2O3 and Na3AlF6 mixture.
80 On the labeled axes in yoTuhre
the forward reaction represented by this equation. [1]
013 #80
P.S./Chem.–June ’13
78 [1]
79 [1]
80 [1]
Allow 1 credit for 197 kJ.
[14]
Allow 1 credit. Acceptable responses include, but are not limited to:
V2O5 O5V2
Allow 1 credit.
Answer
Example of a 1-credit response:
Reaction Coordinate
P.S./Chem. Rating Guide–June ’13
[7]
Explanation: The forward reaction is an exothermic reaction because it is releasing energy.
Potential Energy
UNIT 8: KINETICS AND EQUILIBRIUM © 312