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Combustion Unit Test

Total questions: 50

Worksheet time: 13hrs 30mins

Name
Class
Date
1.

What is the value of q in an exothermic reaction?

a)

Positive

b)

Negative

c)

No Value

d)

Impossible to determine

2.

What is the value of q in an endothermic reaction?

a)

Positive

b)

Negative

c)

No Value

d)

Impossible to determine

3.

The amount of energy required to raise the temperature 1ºC for every gram is called____?

a)

Thermal Energy

b)

Specific Heat

c)

Temperature

d)

Kinetic Energy

4.

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is absorbed when a 10 g piece of platinum warms from 100°C to 150°C?

a)

66.5 J

b)

665 J

c)

0.0266 J

d)

0.665 J

5.
How many significant figures: 0.012 km
a)
1
b)
2
c)
3
d)
4
6.

How many sig figs are in the following measurements?

907.0 km

a)

1

b)

2

c)

3

d)

4

7.

How many sig figs are in the following measurements?

2.4050 X 10-3

a)

1

b)

2

c)

3

d)

4

e)

5

8.

Complete the following calculations. Round off your answers as needed.

52.6 g + 309.1 g +77.214 g

a)

438.9

b)

438.914

c)

438.91

d)

4.38914 x 102

9.

Complete the following calculations. Round off your answers as needed.

245.01 km x 2.1 km

a)

5.14521 x 102

b)

510

c)

514

d)

514.521

10.
What does NOT produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
11.
Which of the following removes carbon from the atmosphere?
a)
Combustion
b)
Respiration
c)
Photosynthesis
d)
Death
12.
What process occurs when coal (fossil fuel) is used for energy?
a)
Decomposition
b)
Combustion
c)
Pressurization 
d)
Respiration 
13.
Which process converts carbon in the form of sugar into carbon dioxide gas?
a)
Bioremediation
b)
Photosynthesis
c)
Respiration
d)
Transpiration
14.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
15.

Endo or exo? (system = Hand warmer package)

a)

Endo

b)

Exo

16.
Which of the following is an Alkali Metal? 
a)
Magnesium
b)
Chromium
c)
Sodium
d)
Fluorine 
17.
Which of the following is a Halogen? 
a)
Bromine
b)
Rubidium
c)
Argon
d)
Beryllium
18.
Which of the following is the most reactive group of non-metals? 
a)
Alkali
b)
Alkali Earth
c)
Halogen
d)
Noble Gas
19.
Convert 17 m to cm:
a)
0.17 cm
b)
0.017 cm
c)
1,700 cm
d)
170 cm
20.
Convert 8 kilometers to meters
a)
800 m
b)
80,000 m
c)
8,000 m
d)
.008 m
21.

Name the molecular compound CO

a)

carbon monoxide

b)

monocarbon monoxide

c)

carbide

d)

oxygen carbide

22.
What is the proper name for CaCl2?
a)
Calcium dichloride
b)
Monocalcium dichloride
c)
Calcium chloride
d)
Calcium chlorine
23.

Name the ionic compound, FeBr3

a)

Iron (II) bromide

b)

Iron (III) bromide

24.

A sample of metal has a mass of 5.2 g and absorbs 4.78 cal of energy as it is heated from 30.0°C to 37.35°C. What is the heat capacity of the metal?

a)

183 cal/g °C

b)

0.025 cal/g °C

c)

0.031 cal/g °C

d)

1.25 cal/g °C

25.

How many calories of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C?


Caluminum = 0.215 cal/g °C

a)

70.95 cal

b)

118 cal

c)

71 cal

d)

47.3 cal

26.
Which of these is NOT an essential part of fire.
a)
Fuel.
b)
Friction.
c)
Heat.
d)
Oxygen.
27.
Water exists as a _____________ at 3 mmHg and 50 °C.
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
28.
Which statement is true for carbon dioxide at -60 °C?
a)
All three phases are possible.
b)
It can exist as a solid or a gas, depending on pressure.
c)
It is a solid.
d)
With enough pressure it can be melted.
29.
The pressure is increased on a sample of water at 0 °C from 0 mmHg to 800 mmHg.  In order, what changes occur?
a)
deposition, melting
b)
sublimation, melting
c)
condensation, freezing
d)
deposition, freezing
30.

The specific heat of an unknown metal was 1.396 J/g*C. The metal had a mass of 1.200 mg. The amount of energy that was added was 3,198 joules. What was the temperature change with this reaction?

a)

1,900 *C

b)

1,909,025.788 *C

c)

1,909,000 *C

d)

1,909.025 *C

31.
It is a measure of how close measurements come to each other when they are made in the same way
a)
Accuracy
b)
Precision
c)
Error
d)
Extrapolation
32.

What is seen here on the photo?

a)

High Accuracy & High Precision

b)

High Accuracy & Low Precision

c)

Low Accuracy & High Precision

d)

Low Accuracy & Low Precision

33.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
34.
Which elements are found on the right side of The Periodic Table?
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Water
35.
Which element is least likely to conduct heat and electricity? 
a)
O
b)
Si
c)
Po
d)
Ca
36.
How many electrons does Xenon have?
a)
131.20
b)
27
c)
54
d)
10
37.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

38.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

39.
What happens when my glass of water is sitting in the sun and disappears into a gas?
a)
evaporation
b)
burning
c)
melting
d)
freezing
40.
When a gas changes directly to a solid, the process is known as what?
a)
Sublimation
b)
Condensation
c)
Deposition
d)
Evaporation
41.

According to the pie chart, the United States relies on fossil fuels for about what percentage of its energy?

a)

30%

b)

45%

c)

100%

d)

80%

42.
What is the relationship between the independent variable and the dependent variable?
a)
As time increase, distance decreases
b)
As time increases, distance increases
c)
As time decreases, distance decreases
d)
As time decreases, distance increases
43.
The Independent/Manipulated Variable goes on the ___ axis
a)
x
b)
y
44.
Is water melting a physical or chemical change?
a)
Physical
b)
Chemical
45.
Is digesting your food a physical or chemical change?
a)
Physical
b)
Chemical
46.
Is bending copper wire a physical or chemical change?
a)
Physical
b)
Chemical
47.
When things burn this is a chemical reaction called COMBUSTION.  What does every combustion reaction require?
a)
Hydrogen
b)
Carbon dioxide
c)
Oxygen
d)
Water
48.

Which of these is a factual statement about carbon?

a)

Humans use far too much carbon-based fuel

b)

Carbon is the fourth-most abundant element in the universe

c)

There is no relationship between carbon emissions and global climate change.

d)

Burning rainforests helps restore equilibrium to the carbon cycle.

49.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False
50.

There have been many who have debated the best candy in the world, but there is only one right answer. What is the best candy in the world?

a)

Gummies!!!!

b)

Rocks

c)

Dirt

d)

Worms

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