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College Thermodynamics
Which of the following reactions correctly demonstrates an increase in positional entropy?
  1. 2H2(g)+O2(g)→2H2O(l)
  2. N2(g)+O2(g)→2NO(g)
  3. N2O4(g)→2NO2(g)
  4. None of the above
College Thermodynamics
For reactants involving gas molecules, which of the following conditions need to be constant, in order to determine changes in positional entropy?
  1. Temperature, only
  2. Pressure, only
  3. Temperature and Pressure, only
  4. Volume, only
College Thermodynamics
Which of the following factors dominates changes in positional entropy for particles in a reaction, when gaseous reactants and products are involved?
  1. The temperature of the particles
  2. The volume of the particles
  3. The physical states of the particles themselves
  4. The numbers of gaseous reactants and products
College Thermodynamics
Which of the following accounts for the entropy value of a perfect crystal at 0 K?
  1. All of the particles are arranged in a regular pattern
  2. All of the particles are arranged in a perfect position in the lattice structure
  3. All of the particles move past one another with minimal entropy
  4. All of the particles are evenly dispersed
College Thermodynamics
Which of the following represents changes in directionality, when ∆Gº decreases?
  1. The reaction shifts to the left
  2. The reaction does not change
  3. The reaction's directionality depends on the actual value of ∆Gº
  4. The reaction slowly shifts to the right
College Matter
Which of the following correctly describes effusion?
  1. The movement of a gas into an area of higher pressure, always
  2. The movement of a gas into a vacuum
  3. The mixing of gases
  4. None of the above
College Quantum Physics and the Atom
Which of the following equations represents the energy lost or gained?
  1. ∆E=∆mc2
  2. ∆E=∆(mc)2
  3. ∆E=nhv
  4. ∆E=nhv
College Quantum Physics and the Atom
Which of the following correctly represents a distinct feature of orbitals?
  1. They represent circular orbits
  2. They represent randomized regions of electrons
  3. They do not represent circular orbits, but rather probabilistic regions of electrons
  4. (a) and (b)
College Quantum Physics and the Atom
What is one difference between photoelectronic spectroscopy and measurements of first ionization energy?
  1. Photoelectronic spectroscopy only measures the first ionization energy using electrons removed from the outermost shell
  2. There is no distinction between them
  3. Photoelectronic spectroscopy can be measured using an electron removed from any energy level
  4. The kinetic energy of all electrons are measured in photoelectronic spectroscopy
College Quantum Physics and the Atom
Which of the following is paramagnetic?
  1. He
  2. Be
  3. Li
  4. Ne
College Matter
Which of the following correctly describes diffusion?
  1. The movement of gases into an area of higher pressure, always
  2. The movement of gases into a vacuum
  3. The mixing of gases
  4. Both (a) and (b)
College Quantum Physics and the Atom
Which of the following represents Planck's constant, h?
  1. 6.626×10-34J•s
  2. 6.626×10-32J•s
  3. 6.626×10-31J•s
  4. 6.626×10-30J•s
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 Quantum Physics and the Atom
How many f orbitals exist?
  1. 14
  2. 3.5
  3. 3
  4. 7
College Quantum Physics and the Atom
Which of the following has a spherical shape?
  1. s
  2. d
  3. p
  4. f
College Quantum Physics and the Atom
Which wavelength of radiation is harmful to humans and can be ameliorated by the presence of ozone in the atmosphere?
  1. 10-12m
  2. 10-4m
  3. 1m
  4. 10-8m
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