1. The problem statement, all variables and given/known data A cube of aluminum is 20 cm on edge. Aluminum has a density 2.7 times that of water (1 g/cm3) and a specific heat 0.217 times that of water (1 cal/g·C). The heat in calories needed to raise the temperature of the cube from 20°C to 30°C is about: 2. Relevant equations 3. The attempt at a solution I say 470000, book says 47000. Who's right? Mass = 20^3 (2.7) = 21600 g If 2.17 cal are required to raise 1 gram 1 degree, then 46872 are required to raise 21600 grams 1 degree. But we want to raise it 10 degrees, not 1 degree. So, 46872 x 10 is about 470000.