ASU CHM 118 FINAL EXAM QUESTIONS AND
ANSWERS 100% CORRECT
The law of ________ states that energy that can be neither created or destroyed - ANSWER the
conservation of energy
Which of the following signs on q and w represent a system that is doing work on the
surroundings, as well as gaining heat from the surroundings?
A. q = -, w = -
B. q = +, w = +
C. q = +, w = -
D. = -, w = +
E. None of these represent the system referenced above. - ANSWER C. q = +, w = -
[An object can possess kinetic energy, the energy of motion, and/or potential energy, the
energy of position. Energy can be transferred in many ways, one of which is in the form of
work. Work, w, is the energy transferred when an object is caused to move a distance, d,
against a force, F. Mathematically, we would write this as w=Fd
Force is the product of mass, m, and acceleration, a: F=ma
When the acceleration is due to gravity, the symbol g is used instead of a, and its value is g =
9.81 m⋅s−2]
Part A: How much work is done when a 145 g tomato is lifted 12.4 m? - ANSWER w = 17.6 J
,[An object can possess kinetic energy, the energy of motion, and/or potential energy, the
energy of position. Energy can be transferred in many ways, one of which is in the form of
work. Work, w, is the energy transferred when an object is caused to move a distance, d,
against a force, F. Mathematically, we would write this as w=Fd
Force is the product of mass, m, and acceleration, a: F=ma
When the acceleration is due to gravity, the symbol g is used instead of a, and its value is g =
9.81 m⋅s−2]
Part B: The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground?
Assume 80.0 % of the work done in Part A is transferred to kinetic energy, E, by the time the
tomato hits the ground. - ANSWER v = 14.0 m/s
For a process at constant pressure, 49,600 calories of heat are released. This quantity of heat
is equivalent to:
A. 4.82 × 10-6 J.
B. 2.08 × 105 J.
C. 1.19 × 104 J.
D. 1.24 × 104 J. - ANSWER B. 2.08 × 105 J.
information you need to know about ΔE for the system - ANSWER [The total change in
internal energy is the sum of the heat, q, and work, w: ΔE=q+w]
,the sign of ΔE for the system:
negative (-) = The system expands
and the surroundings
get hotter
positive (+) = The system contracts
and the surroundings
get colder
Which of the following is TRUE if ΔE sys = - 115 J?
A. Both the system and the surroundings are losing 115 J.
B. The system is losing 115 J, while the surroundings are gaining 115 J.
C. The system is gaining 115 J, while the surroundings are losing 115 J.
D. Both the system and the surroundings are gaining 115 J.
E. None of the above are true. - ANSWER B. The system is losing 115 J, while the surroundings
are gaining 115 J
Define thermal energy.
A. energy associated with the temperature of an object
B. energy associated with the force of an object
C. energy associated with the motion of an object
, D. energy associated with the position or composition of an object
E, energy associated with the gravity of an object - ANSWER A. energy associated with the
temperature of an object
Define kinetic energy.
A. energy associated with the force of an object
B. energy associated with the temperature of an object
C. energy associated with the gravity of an object
D. energy associated with the motion of an object
E. energy associated with the position or composition of an object - ANSWER D. energy
associated with the motion of an object
Define potential energy.
A.energy associated with the gravity of an object
B.energy associated with the force of an object
C. energy associated with the motion of an object
D. energy associated with the position or composition of an object
E. energy associated with the temperature of an object - ANSWER D. energy associated with
the position or composition of an object
[A silver block, initially at 58.8 ∘C, is submerged into 100.0 g of water at 25.0 ∘C, in an
insulated container. The final temperature of the mixture upon reaching thermal equilibrium
ANSWERS 100% CORRECT
The law of ________ states that energy that can be neither created or destroyed - ANSWER the
conservation of energy
Which of the following signs on q and w represent a system that is doing work on the
surroundings, as well as gaining heat from the surroundings?
A. q = -, w = -
B. q = +, w = +
C. q = +, w = -
D. = -, w = +
E. None of these represent the system referenced above. - ANSWER C. q = +, w = -
[An object can possess kinetic energy, the energy of motion, and/or potential energy, the
energy of position. Energy can be transferred in many ways, one of which is in the form of
work. Work, w, is the energy transferred when an object is caused to move a distance, d,
against a force, F. Mathematically, we would write this as w=Fd
Force is the product of mass, m, and acceleration, a: F=ma
When the acceleration is due to gravity, the symbol g is used instead of a, and its value is g =
9.81 m⋅s−2]
Part A: How much work is done when a 145 g tomato is lifted 12.4 m? - ANSWER w = 17.6 J
,[An object can possess kinetic energy, the energy of motion, and/or potential energy, the
energy of position. Energy can be transferred in many ways, one of which is in the form of
work. Work, w, is the energy transferred when an object is caused to move a distance, d,
against a force, F. Mathematically, we would write this as w=Fd
Force is the product of mass, m, and acceleration, a: F=ma
When the acceleration is due to gravity, the symbol g is used instead of a, and its value is g =
9.81 m⋅s−2]
Part B: The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground?
Assume 80.0 % of the work done in Part A is transferred to kinetic energy, E, by the time the
tomato hits the ground. - ANSWER v = 14.0 m/s
For a process at constant pressure, 49,600 calories of heat are released. This quantity of heat
is equivalent to:
A. 4.82 × 10-6 J.
B. 2.08 × 105 J.
C. 1.19 × 104 J.
D. 1.24 × 104 J. - ANSWER B. 2.08 × 105 J.
information you need to know about ΔE for the system - ANSWER [The total change in
internal energy is the sum of the heat, q, and work, w: ΔE=q+w]
,the sign of ΔE for the system:
negative (-) = The system expands
and the surroundings
get hotter
positive (+) = The system contracts
and the surroundings
get colder
Which of the following is TRUE if ΔE sys = - 115 J?
A. Both the system and the surroundings are losing 115 J.
B. The system is losing 115 J, while the surroundings are gaining 115 J.
C. The system is gaining 115 J, while the surroundings are losing 115 J.
D. Both the system and the surroundings are gaining 115 J.
E. None of the above are true. - ANSWER B. The system is losing 115 J, while the surroundings
are gaining 115 J
Define thermal energy.
A. energy associated with the temperature of an object
B. energy associated with the force of an object
C. energy associated with the motion of an object
, D. energy associated with the position or composition of an object
E, energy associated with the gravity of an object - ANSWER A. energy associated with the
temperature of an object
Define kinetic energy.
A. energy associated with the force of an object
B. energy associated with the temperature of an object
C. energy associated with the gravity of an object
D. energy associated with the motion of an object
E. energy associated with the position or composition of an object - ANSWER D. energy
associated with the motion of an object
Define potential energy.
A.energy associated with the gravity of an object
B.energy associated with the force of an object
C. energy associated with the motion of an object
D. energy associated with the position or composition of an object
E. energy associated with the temperature of an object - ANSWER D. energy associated with
the position or composition of an object
[A silver block, initially at 58.8 ∘C, is submerged into 100.0 g of water at 25.0 ∘C, in an
insulated container. The final temperature of the mixture upon reaching thermal equilibrium
