Topic 9 - Thermodynamics (Edexcel A Level Physics)

What is Absolute Zero?

• -273 degrees Kelvin

• Where molecules in a substance have no kinetic energy

• When a substance has no internal energy

• Where molecules in a substance have no potential energy

If you were to convert from Kelvin to Celsius, what would you do?

• Add the value of absolute zero

• Minus the value of absolute zero

• Add 273

• Minus 273

What is internal energy?

• The energy inside a molecule

• The combined kinetic and potential energies inside a molecule

• The combined kinetic and potential energies inside a system

• The amount of energy required to increase the temperature of 1kg of substance by 1 degree

What is specific heat capacity?

• The amount of potential energy gained which increases the temperature of 1kg of substance by 1 degree

• The combined kinetic and potential energies inside a molecule

• The combined kinetic and potential energies inside a system

• The amount of energy required to increase the temperature of 1kg of substance by 1 degree

What is fusion (within thermodynamics)?

• The composition of molecules

• The decomposition of molecules

• The process between going from solid to liquid (and vice versa)

• The process between going from liquid to gas (and vice versa)

What is vaporisation (within thermodynamics)?

• The destruction of molecules

• The decomposition of molecules

• The process between going from solid to liquid (and vice versa)

• The process between going from liquid to gas (and vice versa)

What is latent heat?

• The amount of potential energy gained which increases the temperature of 1kg of substance by 1 degree

• The amount of energy required to change state of a substance of a certain mass

• The combined kinetic and potential energies inside a system

• The amount of energy required to increase the temperature of 1kg of substance by 1 degree

What is true about a mole?

• It originally was founded by using Carbon-12

• It originally was founded by using Argon-12

• no. moles =

  actual mass /

  relative mass

• no. moles =

  relative mass /

  actual mass

What is Avogadro's number and what does it do?

• 6.02 x10^23

• 6.02 x10^-23

• Tells you number of moles per mole

• Tells you the number of particles per mole

Which are 3 of the 6 kinetic theory assumptions?

• Particles move in rapid random motion

• Time spent in collisions is little compared to out

• Particles do not have large mass

• Collisions are perfectly elastic

• Collisions are perfectly inelastic