Unit 3: Ch 8, 10, 11 - Definitions & Equations Flashcards Preview

CHEM 120 SUMR'DONE > Unit 3: Ch 8, 10, 11 - Definitions & Equations > Flashcards

Flashcards in Unit 3: Ch 8, 10, 11 - Definitions & Equations Deck (63)
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1

covalent bonds are _ + _

nonmetals + nonmetals

2

covalent bonds in molecules are the sharing of

electrons between 2 ATOMS

3

A single bond is the sharing of

Length and strength:

2 bonding electrons; (1 pair)

longest and weakest

4

A double bond is the sharing of

Length and strength:

4 bonding elections; (2 pairs)

medium

5

A triple bond is the sharing of

Length and strength:

6 bonding elections; (3 pairs)

shortest and strongest

6

Intramolecular interactions are

inside molecules

7

Intermolecular interactions are
(rhyme; inter-vene)

between molecules

8

Electronegativity is the

The highest is

ability of an atom to attract electrons to itself

F!!!

9

An ionic interaction is the

Transfer of electrons

10

A polar covalent bond is the

Unequal-sharing of electrons

11

A nonpolar covalent bond is the

Equal-sharing of electrons

12

Bond polarity is found by the

difference between the 2 electronegativity values

13

Nonpolar molecules shapes are

(slide 41)

Symmetrical shape (NO lone pairs on central atoms with the exterior atoms all the SAME)

14

Polar molecules shapes are

(slide 41)

1. Symmetrical geometry (NO lone pairs) with different exterior atoms all the SAME
2. ANY combination of atoms with a NONsymmetrical geometry (lone pairs)

15

Dipole-Dipole Forces are present in (polar/nonpolar) molecules

polar

16

ionic compounds are _ + _

metal + nonmetal

17

Hydrogen bonding is (strength)
Present ONLY between molecules with _, _ and _ bonds

VERY STRONG

N-H, O-H, H-F bonds

18

London Forces are present in

Everything

19

Heat of Fusion is the

amount of heat needed to melt or freeze 1 g of a substance

20

Heat of Vaporization is the

amount of heat needed to boil/condense 1 g of a substance

21

Heat of Sublimation is the

same for sublimation and deposition

22

Equation for Heat of Fusion

Q = m•Hf

23

Equation for Heat of Vaporization

Q = m•HV

24

For the heating curve
Q1 is
Q2 is
Q3 is
Q4 is
Q5 is

Q1 - ice melting
Q2 - ice melting into water
Q3 - water heating
Q4 - water boiling into steam
Q5 - steam heating

25

For the heating curve the equations for:
Q1 =
Q2 =
Q3 =
Q4 =
Q5 =

Q1 = mCpΔT
Q2 = mΔHfus
Q3 = mCpΔT
Q4 = mΔHvap
Q5 = mCpΔT

26

Dilute concentration is

solution that contains a small amount of solute

27

Concentrated concentration is

solution contain a lot of solute

28

Concentration is

the amount of solute present in a given amount of solvent or solution

29

Percent by Mass =

% by mass = mass solute/mass solution • 100%

30

Volume Percentage =

volume % = volume solute/mass solution • 100%