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Playlist ASVAB Physical Science 19 videos
ASVAB: Physical Science Drill 1, Problem 3. An ion is formed when...what?
ASVAB Physical Science Drill 1, Problem 4. An atom has three protons, three electrons, and four neutrons. What is the charge of the atom?
ASVAB Physical Science 2.1. Matter can exist in which three states?
ASVAB Physical Science 3.4 177 Views
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Description:
ASVAB Physical Science Drill 3, Problem 4. A reaction that gives off heat to the environment is a(n)...
Transcript
- 00:01
No And here's your shmoop du jour Brought to you
- 00:05
by ancient greece Ancient sure but togas are timeless A
- 00:11
reaction that gives off heat to the environment is what
- 00:16
And here the potential answers Extra sermon ended thermic five
- 00:21
dollar words Well depending on the chemicals we use all
Full Transcript
- 00:24
sorts of things can happen in a chemical reaction Sometimes
- 00:28
we makes a couple of things together and nothing happens
- 00:31
And sometimes we makes a couple of things together and
- 00:33
well they go Boom Big boom Right Well these types
- 00:38
of reactions when two substances give off heat are called
- 00:42
exo thermic reactions You are correct Answer option is okay
- 00:47
Xo thermic that comes from a couple of ancient greek
- 00:52
words The root word acts means out and ther mus
- 00:56
is what your uncle in wisconsin uses Keep his coffee
- 00:59
One can check that therm actually means heat So xo
- 01:03
thermic means well he goes out and endo thermic reaction
- 01:08
is just the opposite in an endo thermic reaction Heat
- 01:12
is absorbed when the chemicals react Now cnd displacement and
- 01:17
replacement reactions are essentially the same thing And these types
- 01:20
of reactions to substances react with each other and at
- 01:23
least one of the substances has to be a compound
- 01:26
meaning it's made of more than one element compound lots
- 01:30
people well when the chemicals react one element moves out
- 01:34
of one compound and into the other Let's say we
- 01:37
start with substance a and we mix it with substance
- 01:40
B c well in a replacement or displacement reaction After
- 01:44
the reaction we'd be left with two new chemicals so
- 01:47
we'd start with a nbc and end up with b
- 01:50
and a c Remembering a little ancient greek can really
- 01:54
help make sense in the world and those old dudes
- 01:57
really had a keen sense of fashion We enjoy wearing
- 01:59
togas from time to time It does make thanksgiving awkward 00:02:02.902 --> [endTime] though
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