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Quiz 4 Key - CHM 2045 Quiz#4 Name(write legibly My GTAs...

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CHM 2045 Quiz #4 Name___________________________________________ (write legibly!) My G TA’s Name___________________________ My discussion meets at this day and time (circle one) M 8:30-9:20 T 14:30 15:20 T 10:30 11:20 R 14:30 15:20 R 10:30 11:20 T 15:30 16:20 T 11:30 12:20 R 15:30 16:20 R 11:30 12:20 M 11:30 12:20 This quiz consists of 10 questions worth 2 points each. Answer all 10 for full credit. Calculators are allowed but notes or assistance from other students will not be permitted. Your TA will distribute a periodic table. Write on this quiz, but do not write on the periodic table. 1. Classify each of the following an endothermic (ED) or exothermic (EX) event: Answer I. ΔH rxn is negative EX II. CH 4 (g) + O 2 (g) CO 2 (g) + H 2 O(g) EX III. The temperature of surroundings increase. EX IV. H 2 O(l) H 2 O(s) EX 2. The value of ΔE for a system that performs 111 kJ of work on its surroundings and gains 89 kJ of heat is __________ kJ. (multiple choice, circle one) A) -111 B) -200 C) 200 D) -22 E) 22 3. The internal energy can be increased by __________.(multiple choice, circle one)
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