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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 could increase or decrease
B
temperature increases
C
temperature stays the same
D
temperature decreases
2) A diagonal line on a temperature vs. time graph indicates...
A
melting point
B
a solid, liquid, or gas is changing temperature
C
boiling point
D
a phase change
3) A horizontal line on a temperature vs. time graph indicates...
A
a phase change
B
melting point
C
a solid, liquid, or gas is changing temperature
D
boiling point
4) Cooling a solid causes kinetic (thermal) energy to...
A
decrease
B
increase
C
none of these
D
stay the same
5) Interaction (phase) energy is the highest in...
A
none of these
B
solids
C
liquids
D
gases
6) When a solid changes to a liquid....
A
the particles move slower
B
the particles change from random to patterned arrangement.
C
the particles change from patterned to random arrangement.
D
the particles move faster
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 air
C
molecules of water
D
empty space
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 diagonal line going down
B
not enough information
C
a horizontal line
D
a diagonal line going up
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 diagonal line going up
C
a horizontal line
D
a diagonal line going down
10) When temperature decreases
A
particles stay the same
B
particle speed decreases
C
particle arrangement changes
D
particle speed increases
11) A can of soda warms after being removed from the fridge. What effect would this change have on Ek?
A
stay same
B
decrease
C
increase
D
nochange
12) Ice cream is melting on the counter. What effect would this have on Ek?
A
no change
B
stay same
C
increase
D
decrease
13) When calculating heat energy of a melting substance you should use
A
Heat capacity of solid
B
Heat of fusion
C
Heat capacity of liquid
D
Heat of vaorization
14) What unit is used for energy measurement
A
degrees Celsius
B
none of these
C
Joules
D
grams
15) What happens to Ei (interaction or phase energy) when a glass window pane is warmed on a sunny day?
A
not enough information
B
stays same
C
decreases
D
increases
16) Particles have an orderly arrangement in...
A
liquids
B
solids
C
gases
D
not enough information
17) When determining the energy of a phase change...
A
use Q= m x c x delta T
B
energy stays the same during a phase change
C
not enough information
D
use Q= m x H
18) When determining the energy during heating of a single state of matter
A
use Q= m x H
B
not enough information
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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