AP Chemistry 3.4 Laws of Thermodynamics
AP Chemistry 3.4 Laws of Thermodynamics. What is the specific heat of the metal?
|AP Chemistry||Law of Thermodynamics|
Laws of Thermodynamics
|Test Prep||AP Chemistry|
What is the specific heat of the metal, given that the specific heat of water is ~4 J/g?celcius.
And here are your potential answers.
Hey, maybe if we help Bubba figure out his problem, he’ll give us some free shrimp. [Bubba at the shrimp store]
Nothing motivates like seafood.
All right, let’s take a look at the data that Bubba collected.
It appears that he placed a hotter piece of metal in cooler water, then measured the temperature
of the metal-water mixture. [Bubba with a piece of metal in hot water]
How can we determine the specific heat of the metal with this data?
Well, specific heat, or Cp, refers to the amount of heat required
to raise the temperature of 1 gram of a substance by 1°C.
In order to find the specific heat of the metal, we need to know how much heat was transferred [Piece of metal in a bed of water]
from the metal to the water.
We were given the specific heat of the water, the mass of the water, and the temperature
change of the water, so we can calculate the heat that the water must have absorbed using
the equation heat equals mass times the heat capacity times the change in
Due to the law of conservation of energy, we can assume that the same amount of energy
is released by the metal.
Using the same equation, we can calculate our unknown Cp. [Equation for calculating Cp]
All right, now it’s time for our favorite part, doing the math!
Do the math do the math do the maaaath, do the math do the math do the maaaath…
Alright we're done. Choice B is the one we want.
And now, it's time for seafood. [Bubba sat at a table waiting for his order of seafood]
Okay, Bubba, so that’ll be two orders of popcorn shrimp, a shrimp cocktail – anybody
want some garlic bread?