Chem 162 Actual Exam Questions and
Verified Answers
The ___________ is a comparison of the bond energy of the reactants to the products.
enthalpy
bond energy = amount needed to ________ a bond.
ΔH
break
The __________ factors relates to the randomness/orderliness of a system
ΔS
entropy
The __________ factor is generally more important than the _________ factor.
enthalpy; entropy
if products more stable than reactants, energy released its _________
exothermic
if reactants more stable than products, energy absorbed its __________
endothermic
_____________ is a thermodynamic function that increases as the number of energetically
equivalent ways of arranging the components increases, S
entropy
Therefore State __ has higher entropy than either State __ or State __
C;A;B
The macrostate with the highest _______ also has the greatest dispersal of energy.
, entropy
entropy change is favorable when the result is a more __________ system.
random
Some changes that increase the entropy are:
reactions whose products are in a more disordered state.
(_______ < ________ < _____)
solid; liquid; gas
entropy change is favorable when the result has an ________ in _______ and larger numbers
of _________.
increase in temperature; products
the total entropy change of the universe must be _________ for a process to be ___________.
positive; spontaneous
Heat must flow from _______ to ____ in order for the entropy of the universe to __________.
water; ice; increase
when a system process is exothermic, it ______ heat to the surroundings, increasing the
entropy of the surroundings
adds
when a system process is endothermic, it ______ heat from the surroundings, decreasing the
entropy of the surroundings
takes
when ΔG < 0, there is a __________ in free energy of the system that is released into the
surroundings; therefore a process will be __________ when ΔG is _________.
decrease; spontaneous; negative
Verified Answers
The ___________ is a comparison of the bond energy of the reactants to the products.
enthalpy
bond energy = amount needed to ________ a bond.
ΔH
break
The __________ factors relates to the randomness/orderliness of a system
ΔS
entropy
The __________ factor is generally more important than the _________ factor.
enthalpy; entropy
if products more stable than reactants, energy released its _________
exothermic
if reactants more stable than products, energy absorbed its __________
endothermic
_____________ is a thermodynamic function that increases as the number of energetically
equivalent ways of arranging the components increases, S
entropy
Therefore State __ has higher entropy than either State __ or State __
C;A;B
The macrostate with the highest _______ also has the greatest dispersal of energy.
, entropy
entropy change is favorable when the result is a more __________ system.
random
Some changes that increase the entropy are:
reactions whose products are in a more disordered state.
(_______ < ________ < _____)
solid; liquid; gas
entropy change is favorable when the result has an ________ in _______ and larger numbers
of _________.
increase in temperature; products
the total entropy change of the universe must be _________ for a process to be ___________.
positive; spontaneous
Heat must flow from _______ to ____ in order for the entropy of the universe to __________.
water; ice; increase
when a system process is exothermic, it ______ heat to the surroundings, increasing the
entropy of the surroundings
adds
when a system process is endothermic, it ______ heat from the surroundings, decreasing the
entropy of the surroundings
takes
when ΔG < 0, there is a __________ in free energy of the system that is released into the
surroundings; therefore a process will be __________ when ΔG is _________.
decrease; spontaneous; negative
