An example problem from today’s lecture:
A sleep-deprived parent is warming a bottle for a midnight feeding. He places a bottle containing 250 ml of infant formula at 275K into 300 ml of water at 320 K. When the two liquids reach equilibrium, what is the temperature of the formula?
Answer: Trick question! While the bottle is warming, he dozes off holding the baby, and by the time they wake up, both bottle and water have cooled to only 288K.