Q4 QUIZ 1 MOD 1 THERMODYNAMICS
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Which state of H2O has the greatest entropy?
29water
ice
vapor
- Q1
Which state of H2O has the greatest entropy?
water
ice
vapor
30sSTEM_GC11CTIVa-b-140 - Q2
Which statement is true about the ENTROPY?
Entropy refers to the inability to destroy or create energy.
Entropy refers to the average kinetic energy of the molecules.
Entropy refers to the balance of temperature among two or more systems.
Entropy refers to DISORDER, the unusable energy that escapes a system.
30sSTEM_GC11CTIVa-b-140 - Q3
As a system becomes more disordered, entropy
decreases
increases
cannot be determined
remains the same
30sSTEM_GC11CTIVa-b-140 - Q4
Which is an example of decreasing entropy in a closed system?
ice melting
Boiling water
Freezing water
Cells in a body coming together
30sSTEM_GC11CTIVa-b-140 - Q5
The entropy will usually increase when
a solid changes to a liquid
a reaction occurs that results in an increase in the number of moles of gas
a molecule is broken into two or more smaller molecules
all of these
30sSTEM_GC11CTIVa-b-140 - Q6
What information do we need to perform a calculation of Gibbs Free Energy?
all of the above are needed.
enthalpy of the reaction.
the temperature of the reaction in Kelvin.
entropy of the reaction.
30sSTEM_GC11CTIVa-b-140 - Q7
Which of the following would most likely lead to a spontaneous reaction.
A high positive enthalpy.
A low negative enthalpy.
A low positive enthalpy.
A high negative enthalpy.
30sSTEM_GC11CTIVa-b-140 - Q8
Which combination of ΔH and ΔS NEVER has a spontaneous reaction?
-ΔH and -ΔS
-ΔH and +ΔS
+ΔH and -ΔS
+ΔH and +ΔS
30sSTEM_GC11CTIVa-b-140 - Q9
Your enthalpy is high and negative but your entropy is also negative. What type of temperature would you want to get a spontaneous reaction?
high
low
30sSTEM_GC11CTIVa-b-140 - Q10120sSTEM_GC11CTIVa-b-140
