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Unit 13: Thermodynamics Page 19
the Earth through radiation. the temperature of the puddle of
(There’s nothing between the Earth water increase.
and the sun to conduct through or
(By the way, as the ice is melting,
convent with.)
from where is heat being
Now let’s take explore how, even transferred? Heat is being
though heat can move from one transferred, by conduction, from
object to another, it doesn’t the air.)
necessarily mean that the
temperature of the objects will Heat Capacity
change. You may ask, “What? Heat Think of a dry sponge. Now
can move from one object to imagine putting that sponge under
another without temperature a slowly running faucet. The
changing one little bit?!?!” sponge would continue to fill with
Yea...confusing huh? In this lesson water until it reached a certain
we’re going to take a look at one of point and then water started to
the ways heat can move while the drip from it. You could say that the
thermometer doesn’t. sponge had a water capacity. It
could hold so much water before it
Changing Phases couldn’t hold any more and the
water started dripping out.
When things change phase (change
from solid to liquid or liquid to gas Heat capacity is similar. Heat
or...well, you get the picture) the capacity is how much heat an
temperature of those objects don’t object can absorb before it
change. If you were able to take increases in temperature. This is
the temperature of water as it also referred to as specific heat.
changed from a solid (ice) to a Specific heat is how much heat
liquid you would notice that the energy a mass of a material must
temperature of that piece of ice will absorb before it increases 1°C.
stay at about 32° F until that piece
Each material has its own specific
of ice was completely melted. The
heat. The higher a material’s
temperature would not increase at
specific heat, the more heat it
all.
must absorb before it increases in
Even if that ice was in an oven, the temperature.
temperature would stay the same.
Water is unique in that it has a
Once all the solid ice had
very large specific heat. Liquid
disappeared, then you would see
water’s specific heat is over 4
which is very high. In comparison,
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