10. The internal energy of a system __________. A) is the sum of the kinetic ene
ID: 489121 • Letter: 1
Question
10. The internal energy of a system __________.
A) is the sum of the kinetic energy of all of its components
B) is the sum of the rotational, vibrational, and translational energies of all of its components C) refers only to the energies of the nuclei of the atoms of the component molecules
D) is the sum of the potential and kinetic energies of the components
E) none of the above
11. What is the E (in J) of system that absorbs 12.4 J of heat and does 4.2 J of work on the surroundings?
A) 16.6 B) 12.4 C) 4.2 D) -16.6 E) 8.2
12. A __________ H corresponds to an __________ process.
A) negative, endothermic B) positive, endothermic C) positive, exothermic D) zero, exothermic
E) zero, endothermic
Explanation / Answer
10. B) is the sum of the rotational, vibrational, and translational energies of all of its components
11. E = q-w
= 12.4-4.2 = 8.2J
E) 8.2
H is positive , endothermic reaction
B) positive, endothermic
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