6 chemical energetics (part 2)

0.0(0)
studied byStudied by 0 people
0.0(0)
full-widthCall Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/3

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

4 Terms

1
New cards

entropy

measure of disorder in a system + how probable the state of a system is

2
New cards

factors affecting entropy

temp

  • temp inc, avg KE inc, more quanta of energy to distribute, more ways to distribute large quanta, entropy inc

phase

  • entropy: sol<liq<gas

  • melting: entropy inc

    • negligible vol, but orderly arrangement of particles in solid is destroyed, more ways to arrange particles and distribute energy

  • boiling: bigger entropy inc

    • particles move more randomly, more disordered + large vol inc, more ways to arrange particles

number of particles

  • no. of gas molecules inc, move randomly in all directions (gaseous is most disordered state), entropy inc

gas expansion

  • pressure dec, vol inc, gas spontaneously expands, mroe ways to arrange particles, entropy inc

3
New cards

standard gibbs free energy change of reaction

G = H - TS

  • G<0: spontaneous (thermodynamically feasible)

  • G>0: not spontanous

  • G=0 at eqm

  1. H high, S high: spontanous at high temp (melting, boiling, decomposition)

  2. H low, S low: spontaneous at low temp (freezing, condensation)

  3. H low, S high: spontanous at all temp (organic combustion rxn)

  4. H high, S low: not spontanous at all temp (photosynthesis)

4
New cards

examples of eqm (G=0)

melting & boiling

  • S = H/T