Answer:
1.Kinetic energy 2.Enthalpy
Step-by-step explanation:
We know that diffuser is a device which convert kinetic energy of fluids into pressure energy of fluids,on the other hand nozzle is used to convert the pressure energy of fluids into kinetic energy of fluids. If we want exit velocity of fluid is too high then we use nozzle and if we wand exit velocity of fluid is low then we use diffuser.
We know that enthalpy is also related with pressure so we can say that ,diffuser covert kinetic energy into enthalpy.
Enthalpy h= u + p.v
Where u is the internal energy ,p is the pressure and v is volume.