C. Johannesson

CHAPTER 22

Nuclear

Chemistry

CHAPTER 22

Nuclear

ChemistryIII. Fission & III. Fission &

FusionFusion(p. 717 - 719)

III. Fission & III. Fission & FusionFusion

(p. 717 - 719)

I

IV

III

II

C. Johannesson

A. FA. F issionissionA. FA. F issionission

splitting a nucleus into two or more smaller nuclei

1 g of 235U = 3 tons of coal

U23592

C. Johannesson

A. FA. F issionissionA. FA. F issionissionchain reaction - self-propagating reactioncritical mass -

mass required to sustain a chain reaction

C. Johannesson

B. FusionB. FusionB. FusionB. Fusioncombining of two nuclei to form one nucleus of larger mass thermonuclear reaction – requires temp of 40,000,000 K to sustain1 g of fusion fuel =

20 tons of coaloccurs naturally in

stars

HH 31

21

C. Johannesson

C. Fission vs. FusionC. Fission vs. FusionC. Fission vs. FusionC. Fission vs. Fusion

235U is limited danger of meltdown toxic waste thermal pollution

fuel is abundant no danger of meltdown no toxic waste not yet sustainable

FISSION

FUSION