does ice in salt brine follow carnots law?

philistine41

if you use a perfect efficently refrigeration to make ice at 0 degrees C and take this 0 degree C ice and put it in a salt brine (so it melts at minus 18) does the energy from the total ice melt follow carrnots law. Ie does the amount of energy to bring the ice and brine down to -18 from 0 equal the energy it would take by perfect refrigeration (also with perfect heat transfer)to transfer the energy straight from -18 to ambient temperture?