Chemical Equilibrium

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1. Which of these effects rate constants?

  • Temperature (reaction rate and rated constant)
  • Pressure (Only in composition of the system)
  • Concentration (but it changes reaction rate)
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2. Which of these do not affect equilibrium?

  • Concentration
  • Temperature
  • Catalyst
  • Pressure (if moles differ in products and reactants)

3. Which of these is not used to classify a dispersion system?

  • Coarse dispersion system DP>1000 nm (eg. suspensions, emulsions)
  • Stable system DP>1000 nm (eg. solids)
  • Colloid system (colloids) DP= 1-1000 nm (eg. macromolecules, nanoparticles)
  • Analytic dispersion system (true solutions) DP

4. How to calculate the activity of particle (B)?

  • I= 0.5 (sum of the conc of ions and (charge of ions)^2)
  • 1000RTc
  • aB =YB(activity coefficient) x ConcB
  • RTc

5. If K=1 then

  • The conc of reactants and products are similar and reaction maybe typically reversible
  • The conc of reactants and products are similar and reaction maybe typically irreversible
  • products prevails reactants (if K is very high then it maybe irreversible
  • Reactants prevails products (if K is very low reaction may not occur)

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