1. The problem statement, all variables and given/known data A stack of identical coins is all at a temperature of 100 C. The coins are transferred to a container of room temperature water. After thermal equilibrium is reached the final temperature is 35 C. The Heat lost by a single coin is less/greater/equal to the heat lost by all the coins? 2. Relevant equations Q=mc(Change)T 3. The attempt at a solution I believe the heat lost by one single coin will be equal to the heat lost by all of the coins but im unsure. If you think about it, the stack of coins are all the same and if you compare one coin's heat lost to the heat loss by all the of the same coin wouldnt it be the same. But also if you think about it another way the heat lost of one coin has to be less than the heat lost of all because its one vs a whole system... Some clarification would be awesome thanks!