You add tea to a glass of hot water. A number of changes can be observed, we will call these "macroscopic" observations. Which of these changes can you observe? - Correct Answer Getting cooler, color, smell
There are also submicroscopic changes taking place in the teas. These cannot be detecte...
CHEM 106 POST-LAB QUIZZES || A+ RATED
You add tea to a glass of hot water. A number of changes can be observed, we will call these
"macroscopic" observations. Which of these changes can you observe? - Correct Answer Getting cooler,
color, smell
There are also submicroscopic changes taking place in the teas. These cannot be detected with any of
our five senses, but given the macroscopic changes we have seen, and our hypothesis about the
structure of matter, we might be able to surmise what is happening. Which of the following changes
could NOT logically be presumed to be taking place?
a) When first mixed, tea consists of two different kinds of SMPs
b) After you add the tea to the hot water, SMPs begin to mix
c) The water begins to change color.
d) When fully mixed, the tea still contains two different kinds of SMPs of two different colors - Correct
Answer c) The water begins to change color
When adding the red drink mix into water, we initially observed the presence of two colors (clear water
and red drink powder). In the final photo, only one color is observable. What is this? Choose what you
think to be the correct explanation given our current hypothesis for the structure of matter.
a)Both clear and red SMPs now are mixed and coexist, but the individual SMPs are so small that we can't
see them individually.
b)The red SMPs lost some color to the water
c)The red SMPs of the drink powder reacted with the clear SMP's and formed a new pink SMP
d)A reaction takes place and as a result there is only one kind of SMP left at the end of the reaction -
Correct Answer a)Both clear and red SMPs now are mixed and coexist, but the individual SMPs are so
small that we can't see them individually.
, What are the phases of matter? - Correct Answer solid, liquid, gas
Which phase of matter has the smallest density? - Correct Answer gas
An element in which phase will fill whatever container it's in? - Correct Answer gas
An element in which phase will hold its shape regardless of what container it occupies - Correct Answer
solid
Elements in which of the following phases have mass?
Solid, liquid, gas. - Correct Answer All of them have mass
Elements in which phase of matter use the heat exchange process called conduction? - Correct Answer
SOLIDS
Elements in which of the phase below use the heat transfer process called convection? - Correct Answer
GAS AND LIQUID
A thermos works because it minimizes which kinds of heat transfer? - Correct Answer Conduction (sold)
and Convection (gas/liquid)
Which phase change occurs when ice "disappears" from your freezer?
condensation
sublimation
freezing
boiling - Correct Answer sublimation (solid to gas)
Which phase change helps to keep our bodies cool when we sweat? - Correct Answer evaporation
(liquid to gas)
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