I came across this question, but I dont really understand the answer. Can someone explain it please?
"A gas in a container with a flexible lid is cooled by ice with 250J of energy extracted. Calculate whether the temperature has increased or decreased."
Q = -250 J, W = -250 J, U = 0, no change in temperature
How would I interpret this answer?
Does this mean that the environment has done work on the gas by cooling it (W<0)?