\f1. What was the temperature change of the sand? Show your work. ATsand = TFinal - Tinitial 24 - 21 = 3'C or 3K Therefore the temperature change of the same is 3 C or 3K. 2. What was the change in internal energy of the system? Show your work. Hint: The specific heat for dry sand is about 0.80 J/g.K and the density for sand is 2.3 g/mL. Amount of sand 9mL3. Explain where the heat energy is coming from, if there is no work being done on the system because the volume is constant