Question

what is k4 at this temperature?? equilibrium

Answer 1

It has more than 160:C

Answer 2

Hay mate your answer is here ⤵⤵
The objects will approach the sametemperature, and in the absence of loss to other objects, they will then maintain a constant temperature. They are then said to be in thermal equilibrium. Thermal equilibrium is the subject of the Zeroth Law of Thermodynamics.
Hope it may help you. .