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Chemisty 1 > Chapter 4 Flashcards > Flashcards

Chapter 4 Flashcards

0
Q

State the law of conservation of energy

A

Energy can be neither created or destroyed

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1
Q

What is energy

A

The capacity to do work

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2
Q

How does heat differ from temperature

A

Temperature is the amount of energy in an object where heat is the transfer of energy from a hot object

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3
Q

Explain how an endothermic process differ from an exothermic process

A

Endothermic process- any change in matter in which energy is absorbed from surroundings

Exothermic process- Chang in matter in which energy is released

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4
Q

All physical and chemical changes involve a change in what

A

Energy

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5
Q

Define evaporation

A

The change of a substance from liquid to gas

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6
Q

Define system

A

Consist of all the components that are being studied at any given time

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7
Q

Define surrounding

A

All the things around the object that is being studied or everything outside the system

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8
Q

Energy exists in different forms, including what

A 
Chemical 
Heat 
Electrical
Mechinacal
Light
Sound
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9
Q

Define heat

A

The energy transferred between objects that are at different temperatures

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10
Q

Heat energy is always transferred from what objects to what objects

A

Warmer to cooler

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11
Q

Energy is also transferred a heat during what

A

Chemical change

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12
Q

T(k)-273.15k is = to what

A

to Celsius

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13
Q

T(c)+273.15c is = to what

A

Kelvin

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14
Q

Covert 0c to kelvin

A

273.15k

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15
Q

Covert -50c to Kevin

A

223.15k

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16
Q

Covert 90c to kelvin

A

363.15k

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17
Q

Covert -20c to Kevin

A

253.15k

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18
Q

Covert 100k to Celsius

A

-173.15c

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19
Q

Covert 200k to Celsius

A

-73.15c

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20
Q

Convert 273k to Celsius

21
Q

Covert 350k to Celsius

22
Q

Calculate the specific heat if a substance if a 45g sample absorbs 22j as the temperature is raised from 158k to 238k

23
Q

Give the number of significant figures in 10.0005

24
Give the number of significant figures in 0.003423
4
25
Give the number of significant figures in 2900
2
26
Give the number of significant figures in 8.9X 10^5
2
27
Determine the answer for each of the following. Be sure to use the correct number of significant figures 27.34+6.90+13.124=
47.36
28
Determine the answer for each of the following. Be sure to use the correct number of significant figures 2.8023-4.762=
1.960
29
Determine the answer for each of the following. Be sure to use the correct number of significant figures 0.32x14.50x120=
560
30
Determine the answer for each of the following. Be sure to use the correct number of significant figures 24.1/0.005=
5000
31
Round the number to the 3 significant figure 707.5
708
32
Round the number to the 3 significant figure 2,300.2
2,300
33
Round the number to the 3 significant figure 0.0003350
0.000335
34
Round the number to the 3 significant figure 10.26730
10.3
35
Convert to the correct scientific notation 1747
1.747x10^3
36
Convert to the correct scientific notation 0.00000984
9.84x10^-6
37
Convert to the correct scientific notation 3200.0x10^2
3.2x10^5
38
Convert to the correct scientific notation 0.002014x10^2
2.56x10^16
39
Convert to the correct scientific notation 25600000000000000
2.56x10^16
40
State the number of significant numbers 3218
4
41
State the number of significant numbers 60.080
5
42
State the number of significant numbers 0.000534
3
43
Convert to the correct scientific notation 810,000
8.1x10^5
44
Convert to the correct scientific notation 0.000634
6.34x10^-4
45
Convert to the correct scientific notation 60,000,000
6x10^7
46
Determine the answer for each of the following. Be sure to use the correct number of significant figures 2.34x10^47+ 9.2x10^46
3.3x10^47
47
Determine the answer for each of the following. Be sure to use the correct number of significant figures 9132.0-1.6x10^3
7532
48
Determine the answer for each of the following. Be sure to use the correct number of significant figures 85.26+4.7
90.0
49
Determine the answer for each of the following. Be sure to use the correct number of significant figures 5,108x4.2107
21510

Chemisty 1 (3 decks)

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