Question

give relation between 1 kilowatt and joule

Answer 1

1 kW = 1000.00 j/ s kW is an unit of power and jule is a unit of work energy so there use j/ s

Answer 2

there is no relationship between 1 kilowatt and joule.
there  is a relationship between  1kwh and j
1 kwh=1000 watt x 3600 second
         =3.6 x 10^6 watt second
        =3.6 x 10^6 joule