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Thermodynamics Questions - All Grades

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Grade 6 Thermodynamics
Compared with the Pacific Ocean, a cup of hot chocolate has                                              .
  1. more thermal energy and a higher temperature.
  2. less thermal energy and a higher temperature.
  3. more thermal energy and a lower temperature.
  4. less thermal energy and a lower temperature.
Grade 10 Thermodynamics
Which phase change involves a solid directly changing into a gas?
  1. Deposition
  2. Sublimation
  3. Condensation
  4. Evaporation
Grade 12 Thermodynamics
According to second law of thermodynamics, heat energy cannot be completely converted into useful work owing to                                       .
  1. the entropy of the system
  2. the enthalpy of the system
  3. the internal energy of the system
  4. the translational energy of the system
Grade 10 Thermodynamics
According to the kinetic theory, the molecules of the oxygen gas have, at the same temperature,                                                      .
  1. the same average speed as hydrogen molecules
  2. the same average kinetic energy as hydrogen molecules
  3. the same mass as hydrogen molecules
  4. none of the above
Grade 10 Thermodynamics
What is the temperature that is called the absolute zero?
  1. It is the temperature at which liquid water becomes solid ice.
  2. It is the temperature of – 273.16 °C, or 0K.
  3. It is the temperature at which air becomes a liquid.
  4. None of the above
Grade 11 Thermodynamics
The Kinetic Molecular Theory of gases states that many particles (i.e., atoms or molecules) are
  1. at rest.
  2. in constant random motion.
  3. in thermodynamic equilibrium.
  4. in static equilibrium.
Grade 12 Thermodynamics
Grade 11 Thermodynamics
The Kinetic Molecular Theory states that the pressure of a gas results from
  1. the mass of particles.
  2. the collisions of particles with the walls of a container.
  3. the forces of repulsion between the particles.
  4. the energy loss experienced by each particle.
Grade 10 Thermodynamics
How do the boiling points and freezing points in degrees Celsius of certain substances that are gaseous at room temperature change with increasing molar mass?
  1. In general, the higher the molar mass the higher is the FP and BP.
  2. In general, the higher the molar mass the lower is the FP and BP.
  3. In general, the freezing points and boiling points are directly proportional to the molar mass.
  4. None of the above
Grade 10 Thermodynamics
What is the magnitude (size) of the kelvin as compared to a °C?
  1. The size of the kelvin is the same size as the Celsius degree: 1K = 1°C.
  2. The size of the kelvin is the same – 273.16 °C.
  3. The size of the kelvin is the same size as Fahrenheit degree.
  4. None of the above
Grade 9 Thermodynamics
Allotropes are considered to be what?
  1. Chemical elements to exist in two or more different forms.
  2. An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  3. A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
  4. It is a type of chemical bond that generates two oppositely charged ions.
Grade 11 Thermodynamics
Which of the following reflects a correct assumption of the Kinetic Molecular Theory?
  1. There are constant forces of attraction between the molecules.
  2. There are constant forces of repulsion between the molecules.
  3. There are constant forces of attraction and repulsion between the molecules.
  4. There are no attractive or repulsive forces between the molecules.
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