Changes of state are a result of a change in the matter.

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Kinetic energy.

Explanation: -

Solids have the least kinetic energy and the highest intermolecular force of attraction among the three states of matter.

When heat energy is supplied to the solid, the kinetic energy of the solid particles increases. At some point, the kinetic energy becomes comparable to the intermolecular force of attraction. At that point solids change into liquids.

When further heat energy is given, at certain point the kinetic energy becomes far greater than the intermolecular forces of attraction. At that point it becomes gas.

Given:
   speed- 1400 km/hr
 fuel burning rate -40.7 L/min

   To find:
the amount of fuel the jet consumes on a 1500.km mission.

   solution:
   time taken for 1500 km mission = time taken for 1400 km + time taken for 100 km
  = 60 min + (60/14)
  = 60+4.3
  = 64.3 min
  time taken for 1500 km mission is 64.3 minutes.

   as the missile consumes 40.7 litres of fuel per minute.
 fuel consumed for 1500 km mission = 64.3*40.7
  =2617 litres
 hence the total amount of fuel consumed in 1500 km mission is 2617 litres.