CHEM 134 TEST 2 SUMMER 2 QUESTIONS WITH COMPLETE
SOLUTIONS
what is a statement that correctly describes a spontaneous process?
Ans✓✓✓ All spontaneous processes proceed without outside
intervention.
What major factor leads to a decrease in entropy as the reaction shown
takes place? Ans✓✓✓ The decrease in the number of molecules due to
the formation of new bonds.
If a process is exothermic, does the entropy of the surroundings always
increase, always decrease, or sometimes increase and sometimes
decrease, depending on the process? Ans✓✓✓ always increase
Do all exothermic phase changes have a negative value for the entropy
change of the system? Ans✓✓✓ Yes, because the heat transferred from
the system has a negative sign.
What can be said about an endothermic reaction with a negative entropy
change? Ans✓✓✓ spontaneous in the reverse direction at all
temperatures.
What can be said about an exothermic reaction with a negative entropy
change? Ans✓✓✓ spontaneous at low temperatures.
SOLUTIONS
what is a statement that correctly describes a spontaneous process?
Ans✓✓✓ All spontaneous processes proceed without outside
intervention.
What major factor leads to a decrease in entropy as the reaction shown
takes place? Ans✓✓✓ The decrease in the number of molecules due to
the formation of new bonds.
If a process is exothermic, does the entropy of the surroundings always
increase, always decrease, or sometimes increase and sometimes
decrease, depending on the process? Ans✓✓✓ always increase
Do all exothermic phase changes have a negative value for the entropy
change of the system? Ans✓✓✓ Yes, because the heat transferred from
the system has a negative sign.
What can be said about an endothermic reaction with a negative entropy
change? Ans✓✓✓ spontaneous in the reverse direction at all
temperatures.
What can be said about an exothermic reaction with a negative entropy
change? Ans✓✓✓ spontaneous at low temperatures.
