A 20.0 g sample of aluminum is cooled 7.5 CThe specific heat capacity of Al is 0.900 J/gCWhat is the energy change for this sample?
A) 140 kJB) 140 JC) -140 kJD) -140 JE) This question cannot be answered unless the amount of water is known.Is the answer B? I keep getting -135 J for some reason
