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ASVAB Physical Science 2.3. Melting is the process through which...what?
ASVAB Physical Science 2.4. A substance that consists of two or more things that are physically mixed together is a...what?
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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