Boundary Conditions for Oil Vaporizing Heating Block

Can someone please help me with the project shared below? I want to simulate the heating of oil by running an electrical current through a heating block. The boundary conditions don’t seem to make sense. I simply want to know how many watts it will take to get the oil to 40 degrees C in 90 seconds and then how many watts it will take to keep the oil at 40 degrees for 6 hours.