Celsius vs Kelvin with heat capacities  [ENDORSED]

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Michelle Chernyak 1J
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Celsius vs Kelvin with heat capacities

Postby Michelle Chernyak 1J » Wed Jan 17, 2018 10:15 am

In the book, it seems as though they sometimes use Celsius and kelvin interchangeably without applying a conversion when referring to heat capacities. Why is that?

Deap Bhandal L1 S1J
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Re: Celsius vs Kelvin with heat capacities

Postby Deap Bhandal L1 S1J » Wed Jan 17, 2018 10:17 am

Usually in the equation, they are using delta T and since both Celsius and Kelvin have the same unit interval, final temp minus initial temp would be the same.

Justin Chu 1G
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Re: Celsius vs Kelvin with heat capacities

Postby Justin Chu 1G » Wed Jan 17, 2018 10:19 am

I think it's because the entire equation (deltaH or q) uses the CHANGE in temperature and not the VALUE of the temperature so the change in degrees Celsius vs the change in degrees Kelvin would be the exact same change as Kelvin is simply Celsius + 273.

Chem_Mod
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Re: Celsius vs Kelvin with heat capacities  [ENDORSED]

Postby Chem_Mod » Wed Jan 17, 2018 10:26 am

I mentioned this several times in class, and also discussed heat capacity units in detail giving several examples: kJ.C-1; kJ.K-1

As discussed there is no conversion needed as a difference of one degree Celsius is the same as a difference of one Kelvin.

20 ---> 30 degrees C
delta T = 10 C

293.15 ---> 303.15 K
delta T = 10 K

Make sure to discuss this in a peer learning session or office hour.


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