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Worksheetsphase change and heating curves
Total questions: 33
Worksheet time: 25mins
When water boils
It gives off energy
It absorbs energy
Neither gives off nor absorbs energy
When water freezes, it
gives off energy
absorbs energy
Neither gives off nor absorbs energy
Between which two points is the thermal energy increasing?
A ----> B
B <---- C
C ----> D
D ----> E
E ----> F
In which segment is the phase energy increasing?
E-F
D-E
C-D
A measure of the average kinetic energy of the particles in an object is called
Heat
Temperature
Kinetic energy
Enthalpy
Water molecules have the greatest kinetic energy in
Ice at 0 ⁰C
Water at 90 ⁰C
Water at 373 K
Steam at 150 ⁰C
The heat absorbed by melting a solid is known as
latent heat of fusion
latent heat of solid
latent heat of liquid
latent heat of vaporisation
Sweating is an ________ process because heat is released.
endothermic
exothermic
Ice cream melting is an example of an ________ process.
endothermic
exothermic
What is holding molecules in a solid close to each other?
Intermolecular forces
Chemical Bonds
Heat
Cold
Which of these conditions is always true for an exothermic process?
They absorb energy from the surroundings
They release energy into the surroundings.
Which of these conditions is always true for an endothermic process?
They absorb energy from the surroundings
They release energy into the surroundings.
When we add heat to a substance and the graph plateaus, there is no temperature change because energy is needed to
It is a phase change
The kinetic energy is increasing
The kinetic energy is decreasing
nothing happens.
Between which two points is Heat of Fusion?
A <----> B
B <----> C
C <----> D
D <----> E
E <----> F
