AP Chem 1.3 Laws of Thermodynamics
AP Chem 1.3 Laws of Thermodynamics. How much energy would be required to change the temperature of 200 g of aluminum as described in the video?
|AP Chemistry||Law of Thermodynamics|
Laws of Thermodynamics
The Laws of Thermodynamics
Here’s our question:
Aluminum is a metal and a key raw material.
It is used to makes soda cans, foil, and even airplanes.
How much energy would be required to change the temperature of 200.0 g of aluminum from [The question being written out]
10.0 °C to 25.0 °C?
The specific heat of aluminum is 0.902 J/g °C.
And here are the potential answers, alright a bunch of joules [The answers appear]
Alright, lets see (glug, glug, glug) ahhh, seventh can today.
Okay, now that we’re all sufficiently hydrated, let’s get down to defeat the Huns… [Man has his fists up]
…uh. [Guy looks confused]
Sorry, we meant "to defeat this problem."
We're always getting chemistry and Mulan confused. [People in a chemsitry lab]
To solve today’s calorimetry question, we need to use this equation which relates [Teacher writing on a blackboard]
the amount of heat or energy transferred, Q, with a material’s mass, m, heat capacity,
C, and change in temperature, delta T. Phew.
That was a mouthful.
Quick, someone give us an eighth can of soda so we can rehydrate. [Guy drinking another can of soda with a pile of empties behind him]
Ah, much better.
So we’re trying to find Q, the amount of heat or energy transferred into the aluminum [Guy collapses onto the floor]
to heat it up.
From the problem statement, we know that the mass of aluminum that is heated is 200g
We also know that the specific heat is 0.902 joules per gram per degree
Finally, we know the aluminum is heated from 10 °C to 25 °C, which means a change [The equation working is written on the blackboard]
in temperature is 15 °C.
If we multiply this all out, we find that Q is 2,706 joules.
Rounding down to 2,700, this is answer choice (D).
What better way to celebrate our success than with a delicious can of soda? [Guy drinking soda on a plane again]
Ugh, that one was kind of sickening. …and why are our teeth suddenly falling
out? [Guy is crying]
Only one thing to do.
Relax, crack open another can. [Guy smiles and some of his teeth have fallen out]