Question

what is principal of heat exchange ?​

Answer 1

Answer:

When hot body is kept in contact with cold body , then the quantity of heat lost by hot body is equal to the quantity of heat gained by cold body is called principal of heat exchange.

Answer 2

${ \fcolorbox{pink}{pink}{principle \: of \: heat \: exchange}}$

heat energy lost by the object = heat energy gained by the object .this is called principal of heat exchange .