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WorksheetsThe first law of thermodynamics
Total questions: 16
Worksheet time: 10mins
Do molecules generally move faster at 45 C or 106 C?
45 C because molecules have more energy than in 106C
106 C because molecules have more energy than in 45C
106 C because molecules have less energy than in 45C
45C because molecules have less energy than in 106 C
When you place the metal in boiling water, heat flows from the _________ to the _______.
metal to the boiling water
bottom of the metal to the top half of the metal
bottom of the water to the top of the water
boiling water to the metal
The 1st law of Thermodynamics
Energy can not be created or destroyed. It just changes forms.
Energy can only be created by the sun
Some energy is lost to the environment.
The variable for HEAT
Q
C
T
The variable of WORK is
W
Q
E
Thermal energy always travels from ______ temperatures to ______ temperatures.
Higher / Lower
Lower / Higher
Higher / Higher
What happens on a molecular level when heat is removed from an object?
the temperature decreases and the molecules move faster
the temperature increases and the molecules move slower
the temperature increases and the molecules molecules move faster
the temperature decreases and the molecules move slower
Why does temperature change always move from regions of hot to regions of cold?
because colder particles have more potential energy
because hotter particles can not slow down
because this is the fastest, most efficient means of conducting thermal energy
because kinetic energy is transferred in the collisions of particles
As the temperature of an abject increases, its molecules
move faster
get samller (condense)
move farther apart (expand)
move faster and farther apart (expand)
True/False: Heat is a type of energy
True
False
Two objects with different temperatures are placed into a system. Which way will heat flow naturally?
From the warmer object to the cooler object.
From the cooler object to the warmer object.
From one object to the other regardless of temperature.
No flow will occur.
