Cellular organelles which use chemical energy stored within the covalent bonds

Mitochondria is the cell organelles which uses chemical energy stored within the covalent bonds of phosphates in ATP. ATP stands for adenosisne triphosphate. In ATP energy is help in covalent bonds. 2nd and 3rd phosphate groups have high energy bonds. The enzyme ATPase hydrolyses the 3rd high energy phosphate bond to separates into ADP + Pi + energy.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do