. The principles of physics. cts another tube, c,. called the overflow, withwhich is connected arubber tube, e. Thistube conveys the warmwater which rises fromthe surface of the heatedworm away to a sink orother convenient recep-tacle. Take a glass flask ofa quart capacity, fill itthree - fourths full ofpond or bog water. Connect the flask by means of a glass delivery-tube molecular energy is altered, or both are altered, is called disgregatimi work. Theheat energy is regarded as the kinetic energy of the molecules in their vibratorymotions, apart from any energy of rotation ahout their own ce
. The principles of physics. cts another tube, c,. called the overflow, withwhich is connected arubber tube, e. Thistube conveys the warmwater which rises fromthe surface of the heatedworm away to a sink orother convenient recep-tacle. Take a glass flask ofa quart capacity, fill itthree - fourths full ofpond or bog water. Connect the flask by means of a glass delivery-tube molecular energy is altered, or both are altered, is called disgregatimi work. Theheat energy is regarded as the kinetic energy of the molecules in their vibratorymotions, apart from any energy of rotation ahout their own centers of mass, andapart from inter- or intra-molecnlar energy. When heat is imparted to a body, it is distributed, in general, so as to produce, invarying relative quantities, four effects, viz.: (1) to raise the temperature byincreasing the vibratory speed of the molecular motion ; (2) to perform externalwork; (3) to perform inter-molecular work ; (4) to perform intra-moleoular and 4 are classed as disgregation Fig. 213. 288 MOLECULAR DYNAMICS. with the extremity a of the worm. Heat the water in the flask ; as soonas it begins to boil, commence siphoning cold water through a small tube, d,from an elevated vessel, E, into the condenser. Inasmuch as the worm isconstantly surrounded with cold water, the steam on passing through itbecomes condensed into a liquid, and the liquid (called the distillate)trickles from the extremity 6 into a receiving vessel. The distillate isclear, but the water in the flask acquires a yellowish brown tinge as theboiling progresses, due to the concentration of impurities (largely ofvegetable matter) which are held in suspension and solution in ordinarypond water. The apparatus used is called a still, and the operationdistillation. When a volatile liquid is to be separated, from water, — forexample, wheii alcohol is separated from the vinous mash afterfermentation, — the mixed liquid is heated to its boiling-point, which is lower than
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysics, bookyear1895
