Energy Changes Question Preview (ID: 16062)


Phase Change Graphs. TEACHERS: click here for quick copy question ID numbers.

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 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

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

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

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 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

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

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

Interaction (phase) energy is the highest in...
a) solids
b) liquids
c) gases
d) none of these

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

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

During a phase change
a) temperature increases
b) temperature decreases
c) temperature stays the same
d) temperature could increase or decrease

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