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Chemistry Ch. 1-4 > Chapter 2 > Flashcards

Chapter 2 Flashcards

0
Q

What is the Law of Conservation of Energy?

A

Energy cannot be created of destroyed

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1
Q

What’s energy?

A

The capacity to do some kind of work such as moving an object.

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2
Q

What is temperature?

A

The measure of the average kinetic energy of the particles in an object.

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3
Q

What is heat?

A

The energy that is transferred between two objects because of a difference in their temperatures

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4
Q

Does an endothermic process absorb of release energy?

A

Absorbs

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5
Q

Does an exothermic process absorb of release energy?

A

Releases

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6
Q

What’s a system?

A

All components that are being studied

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7
Q

What is the surroundings?

A

Everything outside of the system

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8
Q

What are the 6 different forms of energy?

A

Chemical, electrical, mechanical, sound, heat, light.

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9
Q

How many significant figures are in 10.0005?

A

6

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10
Q

How many significant figures are in 0.003465?

A

4

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11
Q

How many significant figures are in 43000?

A

2

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12
Q

How many significant figures are in 6.43?

A

3

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13
Q

How many significant figures are in 7.4x10^4?

A

2

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14
Q

Round 532.35 to 4 significant figures.

A

532.4

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15
Q

Round 45,632 to 3 significant figures.

A

45,600

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16
Q

What does Cp symbolize?

A

Specific heat

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17
Q

What does q symbolize?

A

Energy

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18
Q

How do you add and subtract using significant figures?

A

How many numbers there awe to the right of the decimal.

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19
Q

How to you multiply and divide using significant figures?

A

You’re looking at the least amount of total significant figures

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20
Q

What does J symbolize?

A

Joules

21
Q

What does C symbolize?

A

Celcius

22
Q

What does (triangle)T symbolize?

A

Temperature

23
Q

What does an m symbolize?

A

Mass

24
Q

How does heat transfer to objects?

A

Warmer or cooler

25
Q

Calculate the specific heat of a substance is a 35g sample absorbs 48J as the temperature is raised from 293K to 313K.

A

0.7 J/gk

26
Q

Calculate the specific heat of a substance is a 40g sample absorbs 2342J as the temperature is raised from 124K to 247K.

A

0.5 J/gK

27
Q

Calculate the specific heat of a substance is a 5.00g sample absorbs 17.6J as the temperature is raised from 25C to 40C?

A

0.235 J/gK

28
Q

Calculate the specific heat of a substance is a 95.4g sample absorbs 849J as the temperature is raised from 298.0K to 321.1J?

A

386000 J/gK

29
Q

Calculate the specific heat of a substance is a 1.6g sample absorbs 5.57J as the temperature is raised from 273K to 300K?

A

0.13 J/gK

30
Q

Calculate the specific heat of a substance is a 8.0g sample absorbs 63J as the temperature is raised from 314K to 340K?

A

0.3 J/gK

31
Q

Calculate the specific heat of a substance is a 15.75g sample absorbs 1086.7J as the temperature is raised from 25C to 175C?

A

0.45 J/gK

32
Q

Calculate the specific heat of a substance is a 25.0g sample absorbs 455J as the temperature is raised from 25C to 155C?

A

0.14 J/gK

33
Q

Calculate the specific heat of a substance is a 18.69g sample absorbs 41.72J as the temperature is raised from 10.0C to 27.0C?

A

0.131 J/gK

34
Q

Calculate the specific heat of a substance is a 120g sample absorbs 9612J as the temperature is raised from 25C to 115C?

A

0.51 J/gK

35
Q

How do you convert C to K?

A

Add 273.15

36
Q

How do you covert K to C?

A

Subtract 273.15

37
Q

How much is 63C in K?

A

338.15

38
Q

How much is -55C in K?

A

218.15

39
Q

How much is 205K in C?

A

-68.15

40
Q

How much is 315K in C?

A

41.85

41
Q

How many significant figures are in 20.666?

A

5

42
Q

Add: 11.23 + 9.91 + 12.132

A

33.27

43
Q

Subtract: 2.8890 - 4.763

A

-1.874

44
Q

Multiply: 0.24 x 12.60 x 150

A

450

45
Q

Divide: 24.6/0.005

A

5000

46
Q

Write is scientific notation: 123,000,000

A

1.23 x 10^8

47
Q

Write is scientific notation: 0.000 00982

A

9.82 x 10^-6

48
Q

Write in standard form: 6.4 x 10^5

A

640,000

49
Q

Write in standard form: 8.456 x 10^-2

A

.08456

Chemistry Ch. 1-4 (4 decks)

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