The London, Edinburgh and Dublin philosophical magazine and journal of science . Mag. November 1883.) 2L2 508 Frederick Guthrie on some Thermal and Ether arid Rise of Temperature.§ 270. The liquids were weighed instead of being measured;otherwise they were treated as in § 269, with the exceptionthat two experiments were made in each case ; in the secondexperiment the thermometer-bulb was brought to the tempe-rature shown in the first experiment before being used. Table LXII. Showing Rise of Temperature from 17°#6 on mixing Ether and Chloroform in different proportions by wei
The London, Edinburgh and Dublin philosophical magazine and journal of science . Mag. November 1883.) 2L2 508 Frederick Guthrie on some Thermal and Ether arid Rise of Temperature.§ 270. The liquids were weighed instead of being measured;otherwise they were treated as in § 269, with the exceptionthat two experiments were made in each case ; in the secondexperiment the thermometer-bulb was brought to the tempe-rature shown in the first experiment before being used. Table LXII. Showing Rise of Temperature from 17°#6 on mixing Ether and Chloroform in different proportions by weight. Ether. Chloroform. Rise in temperature. 2 Per. or 33-33 1 „ 50-001-615 „ 61-8 2 „ 66-66 3 „ 75-00 4 „ 80-00 o 8-011-0 11-7 (O4H10O : CHC13)11 510-9 9-6 As we are here merely searching for a maximum, we mayneglect certain effects which would be of the utmost import-ance under other circumstances. Thus the specific heat ofnone of the liquids is the same, and each rise of temperaturegiven is weighted with the specific heat of the liquid in which Fte. Percent. •> 10 20 30 40 50 60 7<» 80 V Volume Changes attending Mixture* 509 it takes place. But I believe I am right in assuming thatthis effect would not in this instance materially shift the placeof the maximum, although it would alter every one of theindividual numbers, and that not in the same proportion. The curve, fig. 5, shows the relationship of increased heat-tension to the proportions of chloroform and ether by weightby which it is caused. From these six experiments, therefore, we find that thegreatest change (rise) of temperature takes place when theliquids are in the proportion of 1 ether to 1*615 of chloroformby weight, which is the proportion of C4Hl0O to CHC13. § 271. This method of experimentation, however, does notallow of such great accuracy as the method of change ofvolume. If it be found that the greatest change of volumetakes place when these weight-ratios (1 ether to 1*615
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