Question

1. For each of the symbols below, select the state function definition: G (Free Energy, Enthalpy, Entropy, Internal Energy) S (Free Energy, Enthalpy, Entropy, Internal Energy) H (Free Energy, Enthalpy, Entropy, Internal Energy) U (Free Energy, Enthalpy, Entropy, Internal Energy) 2. A chemical reaction has just occurred in an isolated system which caused an overall increase in the potential energy of the system. Which statement below is true? Select one: a. The temperature of the system increased. b. The temperature of the system decreased. c. Heat was given off to the surroundings by the system. d. Heat was taken in from the surroundings by the system. 3. If a system does 45 J of work and receives 28 J of heat, what is the value of ΔU for this change? Select one: a. +17 J b. -73 J c. -17 J d. +73 J 4. From the options below, select the statement which best describes the concept of heat: Select one: a. Heat relates to a change in temperature. b. Heat relates to the flow of energy from a hotter object to a colder object. c. Heat relates to the flow of energy from a colder object to a hotter object. d. Heat is measured by the temperature of an object. 5. When a chemical reaction is measured to give off heat, it is said to be: Select one: a. Entropic b. Exothermic c. Enthalpic d. Endothermic 6. If the enthalpy of a chemical reaction has the value of ΔH = -100 kJ/mol, Select one: a. the temperature of the system and the surroundings both increase. b. the system liberates energy which is absorbed by the surroundings. c. the system absorbs energy from its surroundings. d. the temperature of the system and the surroundings both decrease. 7. An exothermic chemical reaction has just occurred in an isolated system. Which statement below is true? Select one: a. The potential energy of the system decreased. b. Heat was taken in from the surroundings by the system. c. The potential energy of the system increased. d. Heat was given off to the surroundings by the system. 8. A chemical reaction has just occurred in an isolated system which caused an overall increase in the potential energy of the system. Which statement below is true? Select one: a. Heat was given off to the surroundings by the system. b. The temperature of the system decreased. c. The temperature of the system increased. d. Heat was taken in from the surroundings by the system. 9. State functions are inter-related and knowing any two fixes the others. In contrast, path functions are observed only as consequences of a particular process of change. From the list of options below, select the list which ONLY lists variables which are considered to be 'state functions'. Select one: a. Gibbs Energy, Entropy, Enthalpy & heat b. Gibbs Energy, Entropy, Enthalpy & work c. Internal Energy, Entropy, Enthalpy & Gibbs Energy d. Temperature, Pressure, Volume, heat & work e. Internal Energy, Entropy, Enthalpy & work f. Internal Energy, Entropy, Enthalpy & heat

          1. For each of the symbols below, select the state function
definition:
G  (Free Energy, Enthalpy, Entropy, Internal Energy)
S  (Free Energy, Enthalpy, Entropy, Internal Energy)
H  (Free Energy, Enthalpy, Entropy, Internal
Energy)
U  (Free Energy, Enthalpy, Entropy, Internal
Energy)
2. A chemical reaction has just occurred in an isolated
system which caused an overall increase in the potential energy of
the system. Which statement below is true?
Select one:
a. The temperature of the system increased.
b. The temperature of the system decreased.
c. Heat was given off to the surroundings by the
system.
d. Heat was taken in from the surroundings by the
system.
3. If a system does 45 J of work and receives 28 J of heat,
what is the value of ΔU for this change?
Select one:
a. +17 J
b. -73 J
c. -17 J
d. +73 J
4. From the options below, select the statement which best
describes the concept of heat:
Select one:
a. Heat relates to a change in temperature.
b. Heat relates to the flow of energy from a hotter object
to a colder object.
c. Heat relates to the flow of energy from a colder object
to a hotter object.
d. Heat is measured by the temperature of an object.
5. When a chemical reaction is measured to give off heat,
it is said to be:
Select one:
a. Entropic
b. Exothermic
c. Enthalpic
d. Endothermic
6. If the enthalpy of a chemical reaction has the value of
ΔH = -100 kJ/mol, 
Select one:
a. the temperature of the system and the surroundings both
increase.
b. the system liberates energy which is absorbed by the
surroundings.
c. the system absorbs energy from its surroundings.
d. the temperature of the system and the surroundings both
decrease.
7. An exothermic chemical reaction has just occurred in an
isolated system. Which statement below is true?
Select one:
a. The potential energy of the system decreased.
b. Heat was taken in from the surroundings by the
system.
c. The potential energy of the system increased.
d. Heat was given off to the surroundings by the
system.
8. A chemical reaction has just occurred in an isolated
system which caused an overall increase in the potential energy of
the system. Which statement below is true?
Select one:
a. Heat was given off to the surroundings by the
system.
b. The temperature of the system decreased.
c. The temperature of the system increased.
d. Heat was taken in from the surroundings by the
system.
9. State functions are inter-related and knowing any two
fixes the others. In contrast, path functions are observed only as
consequences of a particular process of change. From the list of
options below, select the list which ONLY lists variables which are
considered to be 'state functions'.
Select one:
a. Gibbs Energy, Entropy, Enthalpy & heat
b. Gibbs Energy, Entropy, Enthalpy & work
c. Internal Energy, Entropy, Enthalpy & Gibbs
Energy
d. Temperature, Pressure, Volume, heat & work
e. Internal Energy, Entropy, Enthalpy & work
f. Internal Energy, Entropy, Enthalpy & heat

Added by Dominic Y.

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