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WorksheetsCalorimetry Quiz
Total questions: 21
Worksheet time: 5hrs 15mins
If ΔT is positive then heat is being ___________by the reaction, and if ΔT is negative then heat is being _____________by the reaction.
absorbed, released
released, absorbed
heat is staying the same
There is no way to know what is going on with the heat.
A -ΔT means an ______________reaction, and a +ΔT means an _____________ reaction.
endothermic, exothermic
exothermic, endothermic
There is no way to know what type of reaction it is.
There is no change in heat so it is neither exothermic nor endothermic.
A -Q means an _____reaction/process, and a +Q means an ______ reaction/process.
exothermic, endothermic
endothermic, exothermic
There is no way to know this answer.
When you burn something, like the cheese puff from the lab, heat is ____________.
released
absorbed
stays the same
there is no way to know.
Calorimetry is the measurement of the ___________
(Choose the best answer below.)
transfer of heat into or out of a system (reaction/process)
change in temperature
amount of energy required to raise the temperature of 1 gram of the substance by 1°C.
change in the mass of a substance throughout a reaction.
Shown are the units for....
specific heat capacity
mass
temperature
energy
Having a low specific heat means that the substance is able to lose and gain heat energy slowly.
True
False
In the cheese ball lab, −Qcheese ball = +Qwater , the cheese ball has a -Q because it was an __________ and the water (in the soda can) has a positive Q because it was _________.
exothermic reaction, absorbing the energy
endothermic reaction, releasing the energy
The specific heat of water is a known value that we can look up when we need to.
True
False
In our soda can calorimetry lab (see picture), most of the energy from the burning cheese ball went into the water above it in the soda can, which is why most lab groups got a low percent error.
True
False
Select the units for Q
Calories (Cal)
Joules (J)
degrees celsius ∘C
What was the point of the soda can calorimetry lab with the cheese puff?
To experimentally determine the number of calories in a gram of cheese puffs and then compare it to the nutrition label on the back of the container.
To experimentally determine the number of calories in water and then compare it to the actual value.
To experimentally determine if a cheese puff would burn or not.
To experimentally determine the temperature change of a burning cheese puff.
Q = mCpΔT , Q is....
energy
change in temperature
specific heat
mass
Q = mCpΔT, ΔT is....
energy
Change in temperature
specific heat
mass
Q = mCpΔT, Cp is....
energy
Change in temperature
specific heat
mass
Q = mCpΔT, m is....
energy
Change in temperature
specific heat
mass
What type of reaction is it when we burn a cheese puff?
Synthesis
Single Displacement
Double displacement
Combustion
20 g of water. The specific heat of water is 4.18 J/g°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using 10,000 Joules (J) of thermal energy. What material would have the LARGEST change in temperature?
Both Stainless Steels
When a piece of aluminum foil is taken out of the oven and cools from 125° C to 53°C, What is the change in temperature?
72°C
178°C
125°C
53°C
The specific heat of aluminum is 0.897 J/g°C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
448.5 J
60.897 J
557.413 J
55.5 J
