Distillation既問題...help!!!

In distillation, a thermometer is used to measure the boiling point of the liquid component (i.e. the temperature of the vapour). A thermometer is usually fitted because the such a boiling point is usually needed to be known. However, if you don't care about the boiling point, a temperature may not be fitted.
在蒸餾中，溫度計用以量度液態成分的沸點（即蒸氣的溫度）。因為一般要知道沸點，所以通常都會安裝溫度計。但若果你不理會沸點，可以不裝上溫度計。

When the steam is cooled down to a temperature below the boiling point of water (100°C), it is condensed to liquid water.
當蒸氣冷卻至低於水的沸點的溫度（100°C），凝結成液態水。

If water goes into the water jacket of the denser at the bottom, water will fill up the water jacket from bottom to top and leave the water jacket at the top. Therefore, the water jacket of the condenser is fully filled with water.
If water goes into the water jacket at the top, due to gravity, water will fall to the bottom and leave the water jacket rapidly. Therefore, the water jacket would not fully filled with water. Consequently, the cooling effect is lowered.
若果水由底部進入冷凝器的水套，水會由底至頂的充滿水套後，由頂部離開水套。因此，水會充滿冷凝器的水套。
若果水由頂部進入冷凝器的水套，由於地心吸力，水會迅速跌至底部離開水套。因此水套不會充滿水，結果令冷卻效能降低。

thermometer溫度計只是測試溫度，可以唔要

蒸氣遇到比它低ge溫度，是會變番水

water in是喺condenser ge後面，當steam蒸氣經過這前，其實溫度已經降低左少少，在到water in的位置時，水ge溫度同steam ge 溫度差不多，可以再降低steam ge溫度，就會變成水珠

如果water in同water out調轉，剛變成steam ge 溫度比水高，使水便熱，就起唔到冷卻ge作用