BICH 409 EXAM 1 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. isolated system
Answer:
no exchange of energy or matter (thermos, ice chest)
Question:
2. closed system
Answer:
only energy is allowed to be exchanged (chicken egg, unopened soda,
stoppered reaction flask)
Question:
3. open system
Answer:
both energy and matter are allowed to exchange
(human, cell, open reaction flask, opened soda)
Question:
4. what is the only way to change internal energy in a
closed system?
Answer:
heat or work
Question:
5. first law of thermodynamics
Answer:
the energy of the universe is conserved. it can neither be created nor destroyed
Question:
6. heat (q)
Answer:
random thermal motion
Question:
7. what does +q signify
Answer:
heat added to the system from the surroundings
, Question:
8. what does -q signify
Answer:
heat is given up from the system to the surroundings
Question:
9. work (w)
Answer:
organized motion
includes:
- pressure/volume
- mechanical
- electrical
- magnetic
- chemical
Question:
10. what does +w signify
Answer:
work done by the system on the surroundings. system loses energy
Question:
11. what does -w signify
Answer:
work done on the system by the surroundings. system gains energy
Question:
12. expression for first law:
Answer:
deltaE = q - w
Question:
13. what are examples of state functions and how are they
denoted
Answer:
denoted by capital letter, includes internal energy, volume, pressure, temperature,
enthalpy, entropy, free energy, equilibrium constants, and electrical potentials
Question:
14. what does the value of non state functions depend on
Answer:
the pathway used to go from the initial state to the final state.
CORRECT ANSWERS
Question:
1. isolated system
Answer:
no exchange of energy or matter (thermos, ice chest)
Question:
2. closed system
Answer:
only energy is allowed to be exchanged (chicken egg, unopened soda,
stoppered reaction flask)
Question:
3. open system
Answer:
both energy and matter are allowed to exchange
(human, cell, open reaction flask, opened soda)
Question:
4. what is the only way to change internal energy in a
closed system?
Answer:
heat or work
Question:
5. first law of thermodynamics
Answer:
the energy of the universe is conserved. it can neither be created nor destroyed
Question:
6. heat (q)
Answer:
random thermal motion
Question:
7. what does +q signify
Answer:
heat added to the system from the surroundings
, Question:
8. what does -q signify
Answer:
heat is given up from the system to the surroundings
Question:
9. work (w)
Answer:
organized motion
includes:
- pressure/volume
- mechanical
- electrical
- magnetic
- chemical
Question:
10. what does +w signify
Answer:
work done by the system on the surroundings. system loses energy
Question:
11. what does -w signify
Answer:
work done on the system by the surroundings. system gains energy
Question:
12. expression for first law:
Answer:
deltaE = q - w
Question:
13. what are examples of state functions and how are they
denoted
Answer:
denoted by capital letter, includes internal energy, volume, pressure, temperature,
enthalpy, entropy, free energy, equilibrium constants, and electrical potentials
Question:
14. what does the value of non state functions depend on
Answer:
the pathway used to go from the initial state to the final state.
