go to jove.com

HIGH SCHOOL

Chemistry

Concept Videos

Chemistry

This is a free preview. For full access

Chemical Kinetics

Reaction Half-Life in Kinetics

Description

Reaction half-life is the time needed for half of a reactant to be consumed. After each half-life, half of the remaining reactant is used up. A hydrogen peroxide decomposition example shows this pattern clearly. The concentration drops from 1.000 M to 0.500 M in the first 6.00 hours, then to 0.250 M in the next 6.00 hours, a...

Transcript

ํ™”ํ•™ ๋ฐ˜์‘ ์ค‘์— ๋ฐ˜์‘๋ฌผ์˜ ๋†๋„๋Š” ์‹œ๊ฐ„์ด ์ง€๋‚จ์— ๋”ฐ๋ผ ๊ฐ์†Œํ•ฉ๋‹ˆ๋‹ค. ์ดˆ๊ธฐ ์ˆ˜๋Ÿ‰์˜ ์ ˆ๋ฐ˜์œผ๋กœ ์ค„์ด๋Š” ๋ฐ ๊ฑธ๋ฆฌ๋Š” ์‹œ๊ฐ„์„ ๋ฐ˜์‘์˜ ๋ฐ˜๊ฐ๊ธฐ๋ผ๊ณ  ํ•˜๋ฉฐ ์ค„์—ฌ์„œ t 2๋ถ„์˜ 1์ด๋ผ๊ณ  ํ•ฉ๋‹ˆ๋‹ค. ์˜ค์กด์ธต์„ ์ค„์ด๋Š” ๋ƒ‰๋งค ํŠธ๋ฆฌํด๋กœ๋กœํ”Œ๋ฃจ์˜ค๋กœ๋ฉ”ํ…Œ์ธ์„ ์ƒ๊ฐํ•ด ๋ณด์‹ญ์‹œ์˜ค.

์ด ๋ฌผ์งˆ์˜ ๋Œ€๊ธฐ ์ฒด๋ฅ˜์‹œ๊ฐ„์€ 45๋…„์ด๊ณ  ๋งŽ์€ ๋‚˜๋ผ์—์„œ ์‚ฌ์šฉ์ด ๊ธˆ์ง€๋ฉ๋‹ˆ๋‹ค. ๊ทธ๋Ÿฐ๋ฐ ๋†๋„๊ฐ€ 50 ํผ์„ผํŠธ๊นŒ์ง€ ๋‚ฎ์•„์ง€๋Š” ๋ฐ ์–ผ๋งˆ๋‚˜ ๊ฑธ๋ฆด๊นŒ์š”? ๊ฒฝ๊ณผ ํ›„ ๋ฐ˜์‘๋ฌผ์˜ ๋†๋„๋ฅผ ์ถ”์ •ํ•˜๊ธฐ ์œ„ํ•ด ๋ฐ˜๊ฐ๊ธฐ๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋ฐ˜๊ฐ๊ธฐ๋Š” ๋ฐ˜์‘ ์œ ํ˜•๋งˆ๋‹ค ๋‹ค๋ฆ…๋‹ˆ๋‹ค. ๋ฐ˜์‘ ์ฐจ์ˆ˜์— ์ ๋ถ„ํ˜• ์†๋„ ๋ฒ•์น™์—์„œ ์ผ๋ฐ˜์ ์ธ ๋ฐ˜๊ฐ๊ธฐ ์‹์„ ์ถ”์ถœํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. 0์ฐจ ์ ๋ถ„ํ˜• ์†๋„๋ฒ•์น™์„ ์ƒ๊ฐํ•ด๋ด…์‹œ๋‹ค.<...

Tags

More videos by Standards