Quelpr
4 marksThermal Properties

CAPE Physics Unit 1 · 2001 · Paper 2 · Question 8(a)(i)

List TWO factors which would affect the rate of evaporation of a liquid.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 8(a)(ii)Explain in terms of the kinetic theory why each of these factors affects the rate of evaporation.[1 mark]
  2. 8(b)(i)State THREE assumptions of the kinetic theory of gases which are used in the derivation of the expression above.[9 marks]
  3. 8(b)(ii)Write down the equation of state for an ideal gas in terms of its thermodynamic temperature T, stating what each symbol represents.[1 mark]
  4. 8(b)(iii)Hence, show that the average kinetic energy, Eₖ, of a molecule of an ideal gas can be written as Eₖ = (3/2)nRT, where the symbols have their usual meaning.[1 mark]
  5. 8(c)(i)Calculate the number of moles of helium in the container.[5 marks]
  6. 8(c)(ii)Calculate the number of helium atoms in the container.[1 mark]
  7. 8(c)(iii)Calculate the average kinetic energy, Eₖ, of an atom of helium in the container.[1 mark]
  8. 8(d)Calculate the final pressure of the gas.[2 marks]

More practice: the rest of this paper · more Thermal Properties questions · all CAPE Physics Unit 1 past papers