15. Explain why :
(a) Boiled or distilled water tastes flat.
(b) Ice at zero degree centigrade has greater cooling effect
than water at 0°C.
(c) Burns caused by steam are more severe than burns
caused by boiling water.
(d) Rivers and lakes do not freeze easily?
(e) Air dissolved in water contains a higher proportion of
oxygen.
(f) If distilled water is kept in a sealed bottle for a long
time, it leaves etchings on the surface of the glass.
(g) Rain water does not leave behind concentric rings when
boiled.
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Answers
Answer:
Give more points next time. ;)
Explanation:
a. Some of the gases dissolved in the water are evaporated.
b. The molecules move faster in other words easier Diffusion
c. The steam has more *latent heat*
d. Water freezes from the surface to the bottom and if it froze from the bottom it will be extremely fast and wouldn't melt up till next cold season therefore we would basically have Iced lakes and rivers forever.
e. Because oxygen is more soluble in water than other gases.
f. Substances that are insoluble in water dissolve in trace amounts even small amounts of glass dissolves in water which will make etching on the glass surface.
g. It doesn't because rainwater does not contain dissolved solids.
Answer:
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Explanation:
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