text: <unk>  refers to a transformation in which a system releases energy (heat) to the surroundings:
  When the transformation occurs at constant pressure:
  and constant volume:
  In an adiabatic system (e.g. a system that does not give off heat to the surroundings), an<unk>  process results in an increase in temperature.
  Some examples of<unk>  processes are:
  Condensation of rain from water vapour
  Combustion of fuels such as wood, coal and oil
  Mixing water and strong acids
  Mixing alkalis and acids
  The setting of cement and concrete
  Most polymerisation reactions such as the setting of epoxy resin
option_0: Exothermic
option_1: Endothermic
option_2: Sedative
option_3: Flame
option_4: Tachycardia causes
option_5: Hyperthermia causes
option_6: Bradycardia causes
option_7: Acidosis