1'"Quick Cold" is a cold pack used in the early treatment of sprains and bruises' It contains solid

1
(No Transcript)
2

• 1."Quick Cold" is a cold pack used in the early
  treatment of sprains and bruises. It contains
  solid ammonium nitrate. When water is added to
  the solid, the temperature of the resulting
  solution falls well below room temperature.
• Draw an energy profile diagram to illustrate this
  process. Indicate whether ?H for the process is
  positive or negative, and the reaction
  endothermic or exothermic.( 4 marks)
• (b) (i) What essential apparatus
  would you use in an investigation to determine
  the heat of solution per mole of ammonium
  nitrate?
• What measurements would you make, and what TWO
  main precautions would you take in the
  investigation? (10 marks)
• (c)(i) Write a balanced equation for the
  neutralization of
• - sodium hydroxide and hydrochloric acid
  and
• - potassium hydroxide and sulphuric acid.
• (ii) Given that the heat of neutralisation
  per mole of water produced is 56 kJ, what would
  you expect the value to be when one mole each of
  hydrochloric acid and sulphuric acid arc
  completely neutralized? (6marks)
•