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Unit 1 Mid Unit Test Re-take

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Last updated 4 months ago
13 questions
Required
3
HS-PS3-1
HS-PS3-B-1
Required
3
HS-PS3-1
HS-PS3-B-1
2
HS-PS3-1
HS-PS3-B-1
1
1
HS-PS3-1
HS-PS3-B-1
1
HS-PS3-1
HS-PS3-2
HS-PS3-A-1
1
HS-PS3-1
HS-PS3-2
HS-PS3-A-1
1
HS-PS3-1
HS-PS3-2
HS-PS3-A-1
1
HS-PS3-2
HS-PS3-3
HS-PS3-B-1
Required
2
HS-PS3-2
HS-PS3-3
HS-PS3-A-1
1
HS-PS3-2
HS-PS3-3
1
HS-PS3-1
HS-PS3-2
HS-PS3-A-1
2
HS-PS3-1
HS-PS3-B-1
Question 1
1.

334 J/g Heat of fusion (melting or freezing) Hfus
2260 J/g Heat of vaporization (evaporating or condensing) Hvap
2.1 J/g˚C Heat capacity (c) of ice
4.18 J/g˚C Heat capacity (c) of liquid water
1.9 J/g˚C Heat capactiy (c) of steam

Calculate the heat when 25 g of water at 100˚C is converted to steam at 135˚C.

TYPE NUMBERS ONLY. Round to the WHOLE number (ex. 1234)

Question 2
2.

The specific heat of aluminum is 0.380 J/g°C. Calculate the heat when 479 g of aluminum is cooled from 37.2°C to 22.5 °C.

In the typing box, type the NUMBERS only! Round to the WHOLE number (Ex. 1234)

Question 3
3.

Question 4
4.

Question 5
5.

Question 6
6.

Question 7
7.

Question 8
8.

Question 9
9.

Question 10
10.

Question 11
11.

Question 12
12.

Question 13
13.

The specific heats of 4 substances are shown below. If 500 J of energy is applied to each substance,

After 10 minutes, rank the substance from greatest to least temperature change.

Specific Heat of Metals
Iron-0.460 J/g°C
Gold-0.129 J/g°C
Silicon- 0.711 J/g°C
Aluminum- 0.380 J/g°C
Iron
Gold
Aluminum
Silicon
What causes a substance to have high thermal energy but low temperature?
The substance is in a solid phase.
The substance has a low boiling point.
The particles of the substance move fast.
The substance contains many slow-moving particles.
During a change in state from gas to liquid what is happening to the energy of the substance?
Energy is neither added nor released from the substance.
Energy is being released from the substance.
The energy of the substance remains the same.
Energy is being added to the substance.
Which of the following are examples of thermal energy transfer through conduction? Select all that apply.
(Pick 2)
Heating up an air balloon
Accidentally touching a hot plate during a chemical experiment when you are heating a solution in a beaker
Touching the engine hood of a car running
Feeling the warmth from a campfire when you are making smores
Which of the following are examples of thermal energy transfer through convection? Select all that apply.

(Pick 2)
Holding a hot pocket burrito fresh from the microwave
Cooking meat loaf in an oven through the circulation of hot air
Using the microwave to heat up a cup of coffee
Boiling a pot of sugar water in a hot plate
Which of the following are examples of thermal energy transfer through radiation? Select all that apply.

(Pick 2)
Heating up an air balloon
Boiling a solution of salt water in the stove
Heating up a bowl of spaghetti using a microwave
Lighting up a match and feeling the heat
Which of the following objects has the greatest amount of thermal energy?
a 10g piece of burning charcoal at 250°C
a 100g cup of coffee at 90°C
a 100g cup of water at 50°C
the ocean at 22°C
There are three liquids that Mrs. Garcia tests in a lab. She lights a fire underneath all the liquids and takes the temperature in minute increments. Based on her lab data, rank the liquids from lowest to highest specific heat! Note-*not actual lab data.

Castor Oil
Acetic Acid
Acetone
To compare the specific heats of Samples A and B, Ms. Phong heats up 5 grams of Sample A and 5 grams of Sample B to 250°C and places them in two identical bomb calorimeters with the initial temperature of 100 g of water at 20°C.

The Final Temperature of Sample A + Water = 50°C
The Final Temperature of Sample B + Water = 50°C

What can you conclude about the specific heats of sample A and sample B?
The specific heats of Sample A and B are the same.
The specific heat of Sample A is higher than Sample B
The specific heat of Sample B is higher than Sample A
More information needs to be provided.
A 100 g sample of water at 100°C is mixed with a 1000 g sample of water at 25°C. What will the final temperature be closest to?
The final temperature will be around 30°C
The final temperature will be around 10°C
The final temperature will be around 62.5°C
The final temperature will be around 80°C
Mr. Cortez went on another camping trip. He wants to freeze the leftover ramen so he can save it for later.
The initial temperature of his leftover ramen is 90°C. He wants to freeze his ramen at -10°C.


Which parts of the heating curve will you be looking at?
D
A
B
E
C