Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHEM-1315 > Unit 12 > Flashcards

Unit 12 Flashcards

1
Q

The capacity to do work or transfer heat

A

Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The study of heat and energy in chemical reactions

A

Thermochemistry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Energy in an object that is attributable to its motion, position, or both

A

Mechanical Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The energy of motion

A

Kinetic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The energy of an object that is related to its position.

A

Potential Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The SI unit of energy

A

Joule, J

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A specified portion of the universe that is studied

A

System

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The part of the universe that is separate from a system of study

A

Surroundings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

both matter and energy can move between the system and the surroundings

A

Open system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Energy but not matter can move between the system and the surroundings

A

Closed system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Neither matter nor energy can leave or enter the system.

A

Isolated system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The energy resulting from a force acting on an object over a distance

A

Work, w

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The flow of energy that causes a temperature change in an object or its surroundings

A

Heat, q

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When work is being done on the system, w has a (positive/negative) value

A

Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When work is being done by the system, w has a (positive/negative) value

A

Negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When heat is transferred from the surroundings to the system, q is (positive/negative)

A

Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

When heat is transferred from the system to its surroundings, q is (positive/negative)

A

Negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Energy can be neither created nor destroyed in any chemical or physical process

A

Law of conservation of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The first law of thermodynamics

A

The energy of the universe is constant

20
Q

The sum of all kinetic and potential energies of a system

A

Internal Energy, U

21
Q

When work is done on the system and heat is added to the system, then the internal energy of the system is (increases/decreases)

A

Increases; is positive

22
Q

If work is done by the system and heat is released by the system, the the internal energy of the system (increases/decreases)

A

Decreases

23
Q

A function that is independent of the path taken to achieve its value

A

State function

24
Q

Is the internal energy of a system dependent on the pathway taken to achieve it?

A

No

25
Q

A function that is dependent on the sequence of steps that move the system from its initial state to its final state.

A

Path function

26
Q

The work done on or by a system when there is a volume change against an external pressure.

A

Pressure-volume work

27
Q

The sum of the internal energy of a system and the product of its pressure and volume change

A

Enthalpy, H

28
Q

A process in which heat is absorbed from the outside of the system

A

Endothermic process

29
Q

Is the change in enthalpy positive or negative in an endothermic process?

A

Positive

30
Q

A process in which heat is transferred from the system to the surroundings

A

Exothermic process

31
Q

Is the change in enthalpy positive or negative in an exothermic process?

A

Negative

32
Q

The heat given off or absorbed by a process

A

Delta H

33
Q

Is enthalpy a state function?

A

Yes

34
Q

The enthalpy change associated with breaking a specific bond in 1 mol of gaseous molecules

A

Bond enthalpy

35
Q

Energy must be (added/released) to break bond

A

Added

36
Q

Bond breaking is (endothermic/exothermic)

A

Endothermic

37
Q

Energy is (added/released) when bonds are formed

A

Released

38
Q

Bond making is (endothermic/exothermic)

A

Exothermic

39
Q

As bond length increases, bond enthalpy (increases/decreases)

A

Decreases

40
Q

The state at which the substance is most stable at 25 degrees C and 1 atm pressure

A

Standard state

41
Q

The enthalpy change in the formation of 1 mol of a compound from its elements in their standard states

A

Standard enthalpy of formation

42
Q

The enthalpy change of an element in its standard state is. . .

A

zero

43
Q

When two or more processes combine to give a resulting process, their enthalpy changes add to give the enthalpy change for the resulting process.

A

Hesse’s law

44
Q

When an equation is reversed, the sign of its enthalpy . . .

A

Changes

45
Q

When the coefficients in an equation are multiplied or dived by a factor the enthalpy value. . .

A

is multiplied or divided by that same factor

46
Q
A

CHEM-1315 (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions