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College Thermodynamics Questions

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College Thermodynamics
How does the boiling point of octane compare to that of butane, and why?
  1. It has a lower boiling point, because it has stronger intermolecular forces
  2. It has a lower boiling point, because it has weaker intermolecular forces
  3. It has a higher boiling point, because it has stronger intermolecular forces
  4. It has a higher boiling point, because it has weaker intermolecular forces
College Thermodynamics
Which of the following are present in petroleum?
  1. carbon, only
  2. hydrocarbons
  3. hydrogen, only
  4. carbon, hydrogen, and oxygen
College Thermodynamics
Which of the following is an example of a spontaneous process?
  1. The melting of an ice cube, when it is in contact with a body of water at 75ºC
  2. The conversion of kinetic energy into gravitational potential energy
  3. The condensation of liquid particles
  4. The freezing of liquid nitrogen
College Thermodynamics
Which of the following correctly defines ∆Gº?
  1. Change in free energy in converting reactants to products
  2. Change in free energy in converting reactants in the standard state to products in the standard state
  3. Change in energy in converting reactants to products
  4. None of the above
College Thermodynamics
Which of the following equations correctly represents the equation for free energy for a reaction that is NOT at equilibrium?
  1. ∆Gº=-RTlnK
  2. ∆G=∆Gº+RTln(Q)
  3. ∆G=∆Gº-RTln(Q)
  4. ∆G=∆Gº-RT/ln(Q)
College Thermodynamics
Which values of ∆H and T∆S could imply a spontaneous reaction?
  1. ∆H>0 and T∆S<0
  2. ∆H<0 and T∆S<0
  3. ∆H<0 and T∆S>0
  4. ∆H>0 and T∆S>0
College Thermodynamics
Which of the following represents a disadvantage of ∆Gº?
  1. ∆Gº can never be measured
  2. ∆Gº can only be measured when ∆Hº=0
  3. ∆Gº can only be measured when ∆Hº<0
  4. ∆Gº cannot be measured directly
College Thermodynamics
Which of the following values implies a spontaneous process?
  1. ∆Suniv>1
  2. ∆Suniv<0
  3. ∆Suniv=0
  4. ∆Suniv>0
College Thermodynamics
Which of the following petroleum fractions is used in asphalt?
  1. C5-C10
  2. >C25
  3. C10-C18
  4. C15-C25
College Thermodynamics
Which of the following is the value of ∆Gºf of an element in its standard state?
  1. ∆Gºf<0
  2. ∆Gºf>0
  3. ∆Gºf=1
  4. ∆Gºf=0
College Thermodynamics
Which of the following values is the value for ∆Gº, assuming that K>1?
  1. ∆Gº<0
  2. ∆Gº>0
  3. ∆Gº=0
  4. ∆Gº=1
College Thermodynamics
Which of the following can be used as an "anti-knock" agent?
  1. Tetramethane
  2. Diethyl ether
  3. Methyl ethyl ether
  4. Trimethyl lead
College Thermodynamics
Which of the following petroleum fractions is used in gasoline?
  1. >C25
  2. C15-C25
  3. C10-C18
  4. C5-C10
College Thermodynamics
Which of the following does NOT describe a case in which the driving force for a spontaneous process is demonstrated?
  1. H2O(s)→H2O(g)
  2. NaHCO3(s)→Na+(aq)+HCO-3(aq)
  3. N2+3H2→2NH3
  4. None of the above
College Thermodynamics
Which of the following is the value of ∆Gº, assuming that K=1?
  1. ∆Gº>0
  2. ∆Gº<0
  3. ∆Gº=0
  4. ∆Gº=1
College Thermodynamics
Which of the following correctly represents ln(K), in terms of temperature?
  1. ln(K)=-∆HºRT-∆SºR
  2. ln(K)=∆HºRT-∆SºR
  3. ln(K)=∆HºRT+∆SºR
  4. ln(K)=-∆HºRT+∆SºR
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