Chem302 Unit 1 Episodes 1-4

Question 1

Entropy def

Answer 1

Dispersal of energy at constant temp

Question 2

Enthalpy def

Answer 2

Transfer of heat energy at constant p

Question 3

Work def

Answer 3

Organized molecular motion

Question 4

Gibbs free energy def

Answer 4

Energy available to do work

Question 5

What type of rxn is more favorable

Answer 5

Exothermic

Question 6

BP def

Answer 6

Temp which all liquids boil and break ALL IMFs

Question 7

Normal BP def

Answer 7

Temp at pressure of 1 atm

Question 8

How does increasing temp impact dissolution of solid solutes

Answer 8

Increases entropy

Solid disoolves

Question 9

How does increasing temp impact dissolution of gas solute in solvent

Answer 9

Decreases entropy

Gas bubbles out of solution

Question 10

How does increasing temp impact dissolution of liquid solutes

Answer 10

Not necessarily about temp, like dissolves like

Question 11

All covalent solutes are …

Answer 11

Non electrolytes

Question 12

Weak electrolyte

Answer 12

Less than 100 percent dissociation

Question 13

Strong electrolyte

Answer 13

More than 100 percent dissociation

Question 14

Non electrolyte

Answer 14

No dissociation at all

Question 15

Vant Hoff factor formula

Answer 15

Moles particles in solution / moles formula units(usually 1) dissolved
Ex. Na cl = 2

Question 16

Comparing heat of vapor ization is about comparing what?

Answer 16

IMFS!

Question 17

What impacts VP?

Answer 17

ONLY temperature!!

Question 18

Does adding water to a container affect VP and why?

Answer 18

IT DOES NOT AFFECT VP the vp would remain the SAME becuase VP is just the pressure exerted by a vapor that exists in EQUILIBRIUM with is liquid phase

Question 19

If temperature is the same for both containers what is the vapor pressure(VP) for both containers

Answer 19

The vapor pressure (VP) for both containers is the same1

Question 20

What does it mean if a solid sublimes

Answer 20

The pressure will be less than the VP so the solid will never reach equilibrium with the gas and the system will turn entirely into gas

Question 21

How does the energy shift in Exothermic reactions

Answer 21

The energy level goes from high to low

Question 22

If both in liquid phase a molecule with strong IMFS will have a lower H than…

Answer 22

Molecule with weaker IMFS

Question 23

The stronger the what ? The larger the H vap will be btwn phases

Answer 23

INTERmolecular forces(between)

Question 24

Water is NOT

Answer 24

Aqueous

Question 25

When we dissolve salt into solvent what is the sign of triangle H of lattice energy

Answer 25

Positive because it takes energy to break apart the salt

Question 26

Often LE is NEGATIVE because

Answer 26

We are FORMING a crystal