D)2.1 Work, heat, and energy (a). a diathermic system is one that I Diathermic allows energy to escape as heat through its boundary if there is a difference in temperature between the system and its heat surroundings Adiabatic (b). An adiabatic system is one that does not permit the passage of energy as heat Energ through its boundary even if there is a (b) temperature difference between the system and its surroundings 版权所有:华东理工大学物理化学教研室版权所有：华东理工大学物理化学教研室 5 (a). A diathermic system is one that allows energy to escape as heat through its boundary if there is a difference in temperature between the system and its surroundings. (b). An adiabatic system is one that does not permit the passage of energy as heat through its boundary even if there is a temperature difference between the system and its surroundings. 2.1 Work, heat, and energy