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Just a little bit confused about system/surroundings. So, thinking of a calorimeter, water in the surroundings of a system cools. (As a side note, this would mean a negative deltaH value, correct?) If this water in the surroundings were to cool, is the reaction in the system endo- or...

Hi! I own a 2001 Toyota Celica with 75000 miles. Recently, it's began to squeak or chirp. Long story short, I believe it's the belt. When I was getting the oil changed, I told the dealer mechanics and they put something on it. But now that it's cold, it's back. I asked them to put it on again...