Question A7 a) The Debye temperature of graphite is 413 K. Estimate its thermal conductivity at 300 K. Express your answer per atom, in terms of Boltzmann's constant KB. Hint: You will need to evaluate an integral numerically, which you may do using either https://desmos.com/calculator or your own code. Full instructions, and alternatives in case this website is offline, are available on QM+. b) The Debye temperature of diamond is 2250 K. Explain briefly what the difference between the Debye temperatures of diamond and graphite tells us about the difference in bonding between these two materials.

Question A7 a) The Debye temperature of graphite is 413 K. Estimate its thermal conductivity at 300 K. Express your answer per atom, in terms of Boltzmann's constant KB. Hint: You will need to evaluate an integral numerically, which you may do using either https://desmos.com/calculator or your own code. Full instructions, and alternatives in case this website is offline, are available on QM+. b) The Debye temperature of diamond is 2250 K. Explain briefly what the difference between the Debye temperatures of diamond and graphite tells us about the difference in bonding between these two materials.