CAJ | 학술논문

改进电热法测定比热容装置，省去电流表，用阻值恒定的 FeCrAl 合金电阻丝代替，并且设置静音搅拌叶轮，实现溶液自动搅拌。为防止氯化钠溶液电解，用石墨电极代替传统铜电极，测出氯化钠溶液比热容随浓度的变化规律：即在初温相同的条件下，氯化钠溶液比热容随浓度增加而线性降低；随着初始温度的升高，氯化钠溶液比热容随浓度变化曲线整体向上平移。
개진전열법측정비열용장치，성거전류표，용조치항정적 FeCrAl 합금전조사대체，병차설치정음교반협륜，실현용액자동교반。위방지록화납용액전해，용석묵전겁대체전통동전겁，측출록화납용액비열용수농도적변화규률：즉재초온상동적조건하，록화납용액비열용수농도증가이선성강저；수착초시온도적승고，록화납용액비열용수농도변화곡선정체향상평이。
The experimental device,by which the improved electrothermal method is used to test the specific heat capacity,may leave out an ammeter,and the ammeter can be replaced by the re-sistance wire of FeCrAl Alloy which has constant resistance.The device has mute stirring impel-ler,and can mix the solution automatically.In order to prevent the sodium chloride solution from being electrolysed,the traditional copper electrode is replaced by graphite electrode.Then,the variations of the specific heat capacity of sodium chloride solution with the temperature are test-ed.The results of the experiment indicate that the specific heat capacity of sodium chloride solu-tion decreases linearly along with the increase of concentration,and with the changes of the initial temperature,the curve offset slightly.