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- 1. Multiple Choice
For the formula:
Q= m x c x ∆T
The units for specific heat are:
g /cal x °C
°C/g x cal
cal/g
cal/g x °C
- 2. Multiple Choice
What is the name of the instrument used to measure the amount of heat given off by a chemical reaction?
calorimeter
calorie
can
none of these
- 3. Multiple Choice
The specific heat of water is 1 cal/g°C.
If 43.1 cal of energy is added to 6.20 g of water at 18.0 °C, what is the final temperature of the water?
6.95 °C
-11.1 °C
19.8 °C
25.0 °C
- 4. Multiple Choice
What does "ΔT" mean?
A change in health
A change in heat
A change in height
A change in temperature
- 5. Multiple Choice
The unit Joules is for measuring
heat energy
temperature
specific heat
- 6. Multiple Choice
If ...
m= 4.0 g,
c = 1 (cal/g°C)
∆T = 4.0 °C,
calculate Q.
1.6 cal
8 cal
16 cal
1 cal
- 7. Multiple Choice
"The process of measuring the amount of heat released or absorbed in a chemical reaction" is called...
combustion
convection
calories
calorimetry
- 8. Multiple Choice
You perform a calorimetry experiment. You notice you have:
10 g of water
c (of water) = 1 (cal/g °C)
ΔT = 8.0 ⁰C
how many calories are in the cheeto?
7 cal
8 cal
80 cal
0.8 cal
- 9. Multiple Choice
In an exothermic reaction …….
heat energy is given out
heat energy is taken in
nothing happens
don't know????
- 10. Multiple Choice
In an Endothermic Reaction.....
nothing happens
I don't know!!!
Heat Energy is given out
Heat Energy is taken in
- 11. Multiple Choice
True or False: temperature is a measure of how fast particles are moving?
True
False
- 12. Multiple Choice
What is the formula to calculate heat energy required to raise the temperature of any substance?
Q = m x c x ∆t
Q = m x c
Q = ½ m v
m=QC
- 13. Multiple ChoiceThe symbol for specific heat is .......cQmt
- 14. Multiple Choice
The amount of energy required to raise the temperature of 1 gram of a substance by 1ºC ?
Thermal Energy
Specific Heat
Temperature
Kinetic Energy
- 15. Multiple Choice
Specific heat of water is 4.18 J/g°C. Specific heat of wood is 1.760 J/g°C What material needs more heat energy to raise the temperature?
Water
Wood
Both are same
- 16. Multiple Choice
The Q of a substance is positive when it undergoes an
Exothermic process
Endothermic process
- 17. Multiple ChoiceUsing the heat equation, what would the formula look like if we were solving for change in temperature?Q m=∆T cQ/mc= ∆TQm/c=∆TmcQ=∆T
- 18. Multiple Choice
What was the purpose of the "Snack Calorimetry Lab"?
to use a calorimeter
to measure the amount of heat water absorbs
to measure the number of calories in one gram of snack
to determine which snack food contains the greatest amount of potential energy
- 19. Multiple Choice
calorie is a unit used to measure
temperature
amount of energy stored in food
amount of energy absorbed by water
b and c
- 20. Multiple Choice
In the "Calorimetry Snack Lab" we measured the potential energy in food by
using a calorimeter
using the calorimetry equation
assuming that the amount of energy absorbed by water is equal to the amount of potential energy released by the food
all of the above
- 21. Multiple Choice
In a container there are 150 ml of water at 21 degrees Celsius. If the water is warm up to 85 degree Celsius, what is the amount of heat absorbed by water?
2.3 calories
9,600 calories
0.43 calories
none of the above
- 22. Multiple Choice
How many Calories are in 56 calories
0.056 Calories
56000 Calories
0.56 Calories
none of the above
- 23. Multiple Choice
How many calories are in 1 Calorie?
1
10
100
1000
- 24. Multiple Choice
How many Calories are in 10,000 calories?
1
10
100
1000
- 25. Multiple Choice
How many Joules are in 1 calorie of energy?
4.18 J
41.8 J
1000 J
none of the above
- 26. Multiple Choice
Convert 2.40 calories to Joules
4.18
0.574
10.0
none of the above
- 27. Multiple Choice
Convert 2.40 Joules to calories
4.18
0.574
10.0
none of the above
- 28. Multiple Choice
The Q of a substance is negative when it undergoes an
Exothermic process
Endothermic process
- 29. Multiple Choice
Copper has a specific heat of 0.385 J/(g x oC). A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100oC to 200oC. What is the mass of the piece of copper?
1 grams
10 grams
100 grams
none of the above
- 30. Multiple Choice
An unknown substance with a mass of 100 grams absorbs 1000 J while undergoing a temperature increase of 15 oC. What is the specific heat of the substance?
0.7 J/g x oC
7 J/g x oC
70 J/g x oC
none of the above
- 31. Multiple Choice
Endo means in or _______.
absorbed
released
- 32. Multiple Choice
Exo means out or ________.
absorbed
released
- 33. Multiple ChoiceBaking bread and cooking an egg are examples of....?Endothermic processesExothermic processess
- 34. Multiple Choice
When the change in temperature in a substance is negative then the substance undergoes an
exothermic process
endothermic process
- 35. Multiple Choice
When the change in temperature in a substance is positive then the substance undergoes an
exothermic process
endothermic process
- 36. Multiple Choice
Q is negative in an
exothermic process
endothermic process
- 37. Multiple Choice
Itzel, a chemistry student, used a calorimeter to measure the amount of potential energy stored in a peanut. She calculated the amount of energy stored in 1 gram of a peanut to be 4.7 Calories. What is the percent error of her experimental measurement if the actually value is 5.3 Calories per gram.
13 %
11 %
0.11 %
0.13 %
- 38. Multiple Choice
Antonia and her lab team members calculated the stored energy in a potato chip to be 430 cal/g, What is the percent error in their measurement ?
12 %
74 %
92 %
99 %
- 39. Multiple Choice
Using her own calorimeter, Yaviana calculated the potential energy of 1.00 gram of marshmallow to be 1.9 Calories. Calculate the percent error in her measurement.
11 %
37 %
58 %
85 %
- 40. Multiple Choice
What kind of the error arise when improper reading of the instrument due to the improper position of the person's head or eye?
Systematic
Random
- 41. Multiple Choice
Which type of the error can be avoided and corrected?
Systematic
Random
- 42. Multiple Choice
Using wrong amount of indicator for one of the titration
Random error
Systematic error
- 43. Multiple Choice
Modifying a lab procedure to improve it after you perform and experiment and analyze your results reduces the future effects of:
Random errors
Systematic errors
Both random and systematic errors
Neither random or systematic errors
- 44. Multiple Choice
What is the uncertainty on the measurement above?
0.01
0.001
0.002
0.004
- 45. Multiple ChoiceWhich of these is NOT true for systematic errors?They arise due to errors in the measuring instruments used.Repeating the observations or increasing the sample size can eliminate themThey are reproducible inaccuracies that are consistently in the same direction.They arise from the design of the study.
- 46. Multiple ChoiceRepeated measurements of a quantity can reduce the effects ofboth random errors and systematic errorsneither random errors nor random errorsrandom errorssystematic errors
- 47. Multiple Choice
6.5 +/- 0.1 mL
6.6 +/- 0.1 mL
6 +/- 1 mL
6.6 +/- 1 mL
- Answer choicesTagsAnswer choicesTags