Unit 6

Question 1

Endo

Answer 1

absorbs energy

Question 2

exo

Answer 2

releases energy

Question 3

units on /\H

Answer 3

kj/mol

Question 4

when its thermal equilibrium….

Answer 4

same kinetic energy

Question 5

thermal equilibrium is reached as…

Answer 5

particles collide

Question 6

heat transfer

Answer 6

changes from hot to cold via. collisions

Question 7

system

Answer 7

what we are observing/ experimenting

Question 8

surrondings

Answer 8

everything else

Question 9

enthalpy /\ H

Answer 9

heat absorbed or released

Question 10

kinetic energy

Answer 10

energy in motion of particles
-dependent on mass and temp (K)

Question 11

is + or - /\H favorable?

Answer 11

negative

Question 12

-/\H is exo or endo?

Answer 12

exothermic

Question 13

+/\H is exo or endo?

Answer 13

endothermic

Question 14

energy diagrams determine /\H by…

Answer 14

finish vs start

Question 15

gas - liquid - solid

Answer 15

exo -/\H

Question 16

solid - liquid - gas

Answer 16

endo +/\H

Question 17

flat points of phase change diagrams means…

Answer 17

a phase change
temp is constant at this point

Question 18

when phase change diagrams goes up…

Answer 18

there is an increase in KE

Question 19

Hess’s Law

Answer 19

add /\ H
flip sign
^2

Question 20

bond enthalpies - bond breaking

Answer 20

+/\H, endo (reactants)

Question 21

bond enthalpies - bond formation

Answer 21

-/\H, exo (products)

Question 22

entropy

Answer 22

how much chaos/ randomness

Question 23

more mols = _____ entropy

Answer 23

more

Question 24

gas has the ____ entropy

Answer 24

most

Question 25

- or + /\S favorable?

Answer 25

+

Question 26

when calculating /\ H products release heat therefore they are...

Answer 26

negative