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Energy Changes
Test Description: Phase change graphs
Instructions: Answer all questions to get your test result.
1) During a phase change
A
temperature stays the same
B
temperature increases
C
temperature could increase or decrease
D
temperature decreases
2) A diagonal line on a temperature vs. time graph indicates...
A
a solid, liquid, or gas is changing temperature
B
boiling point
C
a phase change
D
melting point
3) A horizontal line on a temperature vs. time graph indicates...
A
melting point
B
a phase change
C
a solid, liquid, or gas is changing temperature
D
boiling point
4) Cooling a solid causes kinetic (thermal) energy to...
A
stay the same
B
none of these
C
decrease
D
increase
5) Interaction (phase) energy is the highest in...
A
none of these
B
gases
C
liquids
D
solids
6) When a solid changes to a liquid....
A
the particles change from patterned to random arrangement.
B
the particles move faster
C
the particles move slower
D
the particles change from random to patterned arrangement.
7) A sample of pure alcohol is brought to a boil. The bubbles forming at the bottom of the container are made of...
A
molecules of alcohol
B
molecules of water
C
empty space
D
molecules of air
8) A sample of ice is pulled from the freezer at -10 C and heat is added. the first portion of its' temperature time graph would be...
A
a horizontal line
B
a diagonal line going up
C
a diagonal line going down
D
not enough information
9) Water vapor at 125 C is cooled to room temperature. The first portion of its' temperature time graph would be...
A
not enough information
B
a horizontal line
C
a diagonal line going up
D
a diagonal line going down
10) When temperature decreases
A
particles stay the same
B
particle arrangement changes
C
particle speed increases
D
particle speed decreases
11) A can of soda warms after being removed from the fridge. What effect would this change have on Ek?
A
nochange
B
decrease
C
increase
D
stay same
12) Ice cream is melting on the counter. What effect would this have on Ek?
A
increase
B
stay same
C
no change
D
decrease
13) When calculating heat energy of a melting substance you should use
A
Heat capacity of solid
B
Heat of vaorization
C
Heat of fusion
D
Heat capacity of liquid
14) What unit is used for energy measurement
A
degrees Celsius
B
grams
C
none of these
D
Joules
15) What happens to Ei (interaction or phase energy) when a glass window pane is warmed on a sunny day?
A
decreases
B
increases
C
not enough information
D
stays same
16) Particles have an orderly arrangement in...
A
liquids
B
gases
C
solids
D
not enough information
17) When determining the energy of a phase change...
A
use Q= m x c x delta T
B
use Q= m x H
C
energy stays the same during a phase change
D
not enough information
18) When determining the energy during heating of a single state of matter
A
not enough information
B
use Q= m x H
C
heating matter changes the state
D
use Q= m x c x delta T
*select an answer for all questions
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