MODULE 4 ERSC 1P94 QUESTIONS AND ANSWERSMODULE 4 ERSC 1P94 QUESTIONS AND ANSWERSMODULE 4 ERSC 1P94 QUESTIONS AND ANSWERS
WHat are the physicak states of water? - ANSWER-water, ice, vapour (steam)
What do the states of water depend on? - ANSWER-physical . parameters: temperature and pressure
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WHat are the physicak states of water? - ANSWER-water, ice, vapour (steam)
What do the states of water depend on? - ANSWER-physical . parameters: temperature
and pressure
100 degrees and 0 degrees - ANSWER-At what temp. does water boil and freeze?
what is atmospheric pressure? - ANSWER-temperature at which these changes of state
take place depends on the pressure that is exerted on the water surface by the
atmosphere
What is the atmospheric pressure at earth's sea level? - ANSWER-1 atm
What does 't' and 'c' stand for in the general phase diagram? - ANSWER-triple point and
critical point
Can ice exist at very high temps? - ANSWER-yes, at very high pressures
What happens if the atmopshere pressure is low? - ANSWER-liquid is not stable
only solids can exist - ANSWER-what happens at very high pressures?
what do liquids do when they are froze?? - ANSWER-contract
becomes denser - ANSWER-What happens to the liquid when it is contracted?
What happens when water freezes at 0c in refular atmopsheric pressure? - ANSWER-
its volume expands by ~9%
What is less dense water or ice? - ANSWER-ice
when does water density decrease? - ANSWER-when it is heated up beyond 4 degrees
4 degrees - ANSWER-What temp. does the deepest part of lakes tend to stay at during
the winter??/
What is dissolved most in water? - ANSWER-salt
three phases of water? - ANSWER-water, ice, vapour
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