Energy Changes Question Preview (ID: 16062)
Phase Change Graphs.
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During a phase change
a) temperature increases
b) temperature decreases
c) temperature stays the same
d) temperature could increase or decrease
A diagonal line on a temperature vs. time graph indicates...
a) a phase change
b) a solid, liquid, or gas is changing temperature
c) melting point
d) boiling point
A horizontal line on a temperature vs. time graph indicates...
a) a phase change
b) a solid, liquid, or gas is changing temperature
c) melting point
d) boiling point
Cooling a solid causes kinetic (thermal) energy to...
a) decrease
b) increase
c) stay the same
d) none of these
Interaction (phase) energy is the highest in...
a) solids
b) liquids
c) gases
d) none of these
When a solid changes to a liquid....
a) the particles move faster
b) the particles change from random to patterned arrangement.
c) the particles change from patterned to random arrangement.
d) the particles move slower
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 air
b) molecules of water
c) empty space
d) molecules of alcohol
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
Water vapor at 125 C is cooled to room temperature. The first portion of its' temperature time graph would be...
a) a diagonal line going up
b) a diagonal line going down
c) a horizontal line
d) not enough information
When temperature decreases
a) particle speed decreases
b) particle speed increases
c) particle arrangement changes
d) particles stay the same
A can of soda warms after being removed from the fridge. What effect would this change have on Ek?
a) increase
b) decrease
c) stay same
d) nochange
Ice cream is melting on the counter. What effect would this have on Ek?
a) increase
b) decrease
c) no change
d) stay same
When calculating heat energy of a melting substance you should use
a) Heat of fusion
b) Heat of vaorization
c) Heat capacity of solid
d) Heat capacity of liquid
What unit is used for energy measurement
a) grams
b) degrees Celsius
c) Joules
d) none of these
What happens to Ei (interaction or phase energy) when a glass window pane is warmed on a sunny day?
a) increases
b) decreases
c) stays same
d) not enough information
Particles have an orderly arrangement in...
a) gases
b) solids
c) liquids
d) not enough information
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
When determining the energy during heating of a single state of matter
a) use Q= m x c x delta T
b) use Q= m x H
c) heating matter changes the state
d) not enough information
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