一、分子力与分子势能分子间存在相互作用力,分子间只有由它们的相对位置决定的势能,这就是分子势能.分子在平衡位置时分子是最稳定的,分子势能最小,但不等于零(以无穷远处为分子势能的零点).因此对一般的物体,当它被压缩或拉伸时其分子势能 1. There is an interaction between molecular forces and molecular potential energy molecules. There is only the potential energy determined by their relative positions between molecules. This is the molecular potential energy. The molecule is the most stable when the molecule is in the equilibrium position, and the molecular potential energy is the smallest but not equal to zero ( The zero point of the molecular potential energy at infinity). Therefore, for a general object, its molecular potential energy when it is compressed or stretched.