
DC -- latent heat
Authored by TRACEY RANKIN
Physics
9th - 12th Grade
Used 5+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How is energy used when causing a solid to change into a liquid?
heat must be applied to increase the temperature.
pressure must be applied to reduce the volume.
chemical reactions must occur to change the structure.
bonds between molecules must be broken to allow them to move freely
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
There is no ------------ until a phase change is complete.
polarization
molecular movement
temperature change
specific heat capacity
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
During which phase change is energy released?
freezing (liquid to solid)
melting (solid to liquid)
boiling (liquid to gas)
sublimation (solid to gas)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The energy involved in a phase change depends on what 2 factors?
the temperature and pressure of the environment
the number and strength of bonds
the outward pressure of the liquid phase
the amount of heat and light present
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In these 2 equations, what does Lf and Lv represent?
the length of each sample
the length of time required for phase change
latent heat constants
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why is the energy of a phase change called latent?
energy enters or leaves a system without causing a temperature change
energy enters or leaves a system without altering the molecular structure
phase changes cannot be measured experimentally
the molecular energy causes cohesive forces
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
According to the graph, about how much energy is absorbed to change water to steam?
~550 cal/g
~750 cal/g
~200 cal/g
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