AP QUIZZES - AP TOPIC 9 Thermochemistry SET D
AP Quizzes - AP TOPIC 9 Thermochemistry SET D.
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QUESTION 1. Consider the reaction profiles below. Which of the reactions have endothermic activation energies?
(A) X only
(B) Y only
(C) Y and Z only
(D) X and Z only
(E) None of the above answers is correct
QUESTION 2. Consider the reaction profiles below. Which of the profiles represents the most exothermic reaction?
(A) X only
(B) Y only
(C) Z only
(D) Y and Z
(E) X and Z
QUESTION 3. Which of the following equations represents the standard enthalpy of formation for Aluminum Chloride?
(A) Al
(s)
+ 3Cl
(g)
==> AlCl
3(s)
(B) Al
(g)
+ 3Cl
(g)
==> AlCl
3(s)
(C) Al
(s)
+ 1.5 Cl
2(g)
==> AlCl
3(s)
(D) Al
(s)
+ Cl
2(s)
==> AlCl
3(s)
(E) Al
(g)
+ 1.5 Cl
2(g)
==> AlCl
3(s)
QUESTION 4. What are the signs of Delta H and Delta S for a reaction that is spontaneous at all temperatures?
(A) Delta H positive, Delta S negative
(B) Delta H positive, Delta S positive
(C) Delta H negative, Delta S positive
(D) Delta H negative, Delta S negative
(E) None of the above
QUESTION 5. The standard enthalpies of formation for ethene (C
2
H
4
), water (H
2
O) and ethanol (C
2
H
5
OH) are +52, -286 and -277 kJmol
-1
respectively. Calculate Delta H for the reaction Ethene + Water ==> Ethanol
(A) +61
(B) -43
(C) -61
(D) -511
(E) -615
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