27. 質量M與m之兩物體以細繩連接如右圖所示。設輪和輪軸的半徑各為R和R/2，且輪之轉動慣量為I。若桌面光滑，則繩之張力T2的大小為何？

6. Given that the enthalpy required to convert CHCl3(g) to gaseous C, H, and Cl atoms is 1397 kJ/mol and that the dissociation enthalpy of a C-H bond is 413 kJ/mol, what is the bond dissociation enthalpy of a C-Cl bond？ (A)328 kJ/mol　(B)603 kJ/mol　(C)984 kJ/mol　(D)1397 kJ/mol