本实验采用的是尼与阿米司多德的方法.为了适于普通物理实验的情况,我们采用热线法对气体浓度差变化的测量.混合气体的导热系数与气体的成份的关系一般是很复杂的.但是当浓度的变化不大时,可以认为通过不平衡电桥的检流计的电流将正比于浓度差. In this experiment, the method of Ni and Amistad was used.In order to adapt to the situation of common physical experiments, we used hot-wire method to measure the change of gas concentration difference.The relationship between the thermal conductivity of gas mixture and the composition of gas is generally very However, when the concentration does not change much, it can be assumed that the current through the galvanometer of the unbalanced bridge will be proportional to the concentration difference.