WorksheetsLAWS OF THERMODYNAMICS
Total questions: 16
Worksheet time: 13mins
How many laws of thermodynamics are there? (that we've talked about in this class before)
a lot
3
4
2
I can't be created nor destroyed. What am I?
energy
air
nothing
a unicorn
Which phase change represents a decrease in entropy?
solid to liquid
gas to liquid
liquid to gas
solid to gas
what is entropy?
the measure of disorder of a system
the amount of energy gained in a reaction
how long it takes for the reaction to occur
the change in temperature during a reaction
the first law of thermodynamics states that
entropy is always increasing
entropy is always decreasing
energy cannot be created or destroyed; only transformed
energy can be created
The second law of thermodynamics states that ...
entropy is constant
the conservation of energy is always occurring
entropy is always increasing
entropy is always decreasing
what is another name for the first law of thermodynamics?
there is not another name
conservation
principle of conservation of energy
chemical energy
can conversions of energy reach 100% of efficiency?
no most transformations are only 10% efficient
yes all of them are 100%
closer to 90%
how much incoming solar radiation is actually converted to heat on earth?
30%
50%
19%
1%
how much incoming solar radiation is reflected away from the atmosphere?
20%
29%
30%
50%
describe an example of the principle of conservation of energy
ice freezing
chemical energy in food transforming into mechanical energy for us to use to move
someone grilling chicken on the stove for dinner
in the entropy conversion process, what is input energy converted to?
heat
output energy
useful energy for work
waste
entropy is always _______ due to ________ _____________
increasing, thermodynamics
decreasing, energy transformations
decreasing, gravity
increasing, energy transformations
