CHEM 103: FINAL EXAM QUESTIONS
WITH ALL CORRECT SOLUTIONS.
Specific heat - Answer s=q/m△T, q=ms△T
heat capacity - Answer C=q/△T, q=C△T
Coffe cup calorimetry - Answer Sm= (-Mw)(Sw)(△Tw)/(Mm)(△Tm)
Qwater=-Qmetal
Coffee Cup calorimetry part 2 - Answer 1. Qsolid=(-Maq )(Saq) (△Taq)
2. Qsolid=-Qaq
In Coffee calorimetry, in increase in temperature - Answer means the reaction was "exothermic" and is
negative.
In coffee calorimetry, if the temperature drops during the reaction, - Answer then the reaction must be
endothermic and is positive.
System does work on surroundings (releases energy) - Answer -w
Surroundings does work on system (absorbs energy) - Answer +w
exothermic - Answer Releases heat, -q
endothermic - Answer Absorbs heat, +q
work - Answer transfer of energy from one form to another
, heat - Answer total kinetic energy that gets transferred from one substance/object to another
potential energy - Answer stored energy
kinetic energy - Answer energy of motion
Law of Conservation of Energy - Answer Energy cannot be created or destroyed.
△Esystem=-△Esurroundings
1kcal - Answer 1000 cal
Relationship between energy, heat, and work - Answer △E=q+w
energy as a product - Answer exothermic
energy as a reactant - Answer endothermic
system - Answer the "thing" being studied
surroundings - Answer the rest of the universe
What atoms can form expanded octets? - Answer S, P, Si, Cl
How do you find the best lewis structure? How do you know which lewis structures have resonance? -
Answer -The best lewis structure would be the lewis structure with the fewest charges possible
-If they have nonzero formal charges on one or two atoms in a lewis structure. If it is neutral, it does not
have a resonance
Resonance structures - Answer a set of structures that show how electrons are distributed. Used when
a single Lewis structure is insufficient
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