Quiz  /  Thermodynamics Class 11 MCQ Questions With Answers

  • 1. 
    How many Joules of energy are required to make 100 grams of ice at 0 οC completely melt? The specific latent heat of fusion of ice is 334000 J/kg

  • 200 J
  • 400 J
  • 33,400 J
  • 2,000,000 J

  • 2. 
    Which of the following is NOT a conductor?

  • oven mitt
  • curling iron
  • iron skillet
  • copper pipe

  • 3. 
    As the temperature of an abject increases, its molecules

  • move faster
  • get samller (condense)
  • move farther apart (expand)
  • move faster and farther apart (expand)

  • 4. 
    1200 J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas?

  • 800 J
  • 1600 J
  • -800 J
  • -1600 J

  • 5. 
    Transfer of heat by contact and collisions between the molecules in a substance.

  • conduction
  • radiation
  • convection

  • 6. 
    Which is an example of decreasing entropy in a closed system?

  • Boiling water
  • Freezing water
  • Cells in a body coming together
  • Ice melting

  • 7. 
    Particles (molecules) in a ______________________ have less energy than the other states of matter.

  • gas
  • solid
  • liquid

  • 8. 
    Rank the following samples from greatest kinetic energy of the molecules to least kinetic energy of the molecules:

  • A > B > C > D
  • B > A > C > D
  • B > A > D > C
  • D > C > B > A

  • 9. 
    What is heat?

  • the amount of thermal energy in an object
  • an object's internal kinetic energy
  • the transfer of thermal energy from one object to another
  • the amount of energy needed to raise the temp of an object

  • 10. 
    What happens to particles when they are heated?

  • They speed up and spread out
  • They slow down and compress
  • They stop moving
  • They move closer together and speed up

  • 11. 
    How does heat move to melt ice?

  • from the ice to the water
  • from the water to the ice
  • from the water to the air
  • from the air to the water

  • 12. 
    The picture shows two completely identical mason jars. They're both filled with the same gas, only one of them has more in it (more molecules). What can you say about the pressures of both jars?

  • P1 > P2 (greater pressure in jar 1)
  • P1< P2 (greater pressure in jar 2)
  • P1 = P2 (same pressure in both)
  • There's not enough info to tell

  • 13. 
    Thermal energy always moves:

  • From a high temperature object to a lower temperature object.
  • From a lower temperature object to a higher temperature object.
  • From an object with lower kinetic energy to an object with higher kinetic energy.
  • From an object of higher mass to an object of lower mass.

  • 14. 
    The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of

  • Convection
  • Conduction
  • Radiation
  • insulation.

  • 15. 
    Particles of a liquid

  • are tightly packed together and stay in a fixed position.
  • have no viscosity.
  • decrease in volume with increasing temperature.
  • are free to move around one another but still touch.

  • 16. 
    During an adiabatic process, a sample of gas does 400 J of work on the environment. What change occurs with the internal energy of the gas?

  • The internal energy increases by 400 J.
  • The internal energy doesn't change.
  • The internal energy decreases by 400 J.
  • There is not enough information if we don't know how much heat was added or removed.

  • 17. 
    What is thermodynamics?

  • movement of heat
  • it's magic
  • measurement of heat
  • none of them

  • 18. 
    If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?

  • -80,371.2 J
  • 44,938.6 J
  • 80,371.2 J
  • 112,575.9 K

  • 19. 
    As a system becomes more disordered, entropy

  • remains the same
  • increases
  • decreases
  • cannot be determined

  • 20. 
    If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?

  • 100 mL
  • 1000 mL
  • They both heat up at the same speed
  • They cool down.

  • 21. 
    When thermal energy is added to a substance, the substance's particles move:

  • More rapidly at an increased diestance from each other.
  • More rapidly with less distance between each other.
  • More slowly with a greater distance between each other.
  • More slowly with a reduced distance between each other.

  • 22. 
    A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?

  • 25 g
  • 30 g
  • 20 g
  • 50 g
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