Heat Capacity

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Vanessa Rojas 4F
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Joined: Wed Feb 20, 2019 12:17 am

Heat Capacity

Postby Vanessa Rojas 4F » Sat Jan 25, 2020 5:58 pm

What is the difference between Specific heat capacity and molar heat capacity?

Kayla Maldonado 1C
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Re: Heat Capacity

Postby Kayla Maldonado 1C » Sat Jan 25, 2020 7:02 pm

Molar heat capacity is the amount of heat needed to raise the temperature of one mole of a pure substance by one degree Kelvin. Specific heat capacity is the amount of heat necessary to raise the temperature of one gram of a pure substance by one degree Kelvin.

KNguyen_1I
Posts: 101
Joined: Sat Aug 17, 2019 12:16 am

Re: Heat Capacity

Postby KNguyen_1I » Sat Jan 25, 2020 8:23 pm

Molar heat capacity I think is the heat needed to raise the temperature of one mole of a substance, while specific heat capacity is more of an intrinsic value to identities of substances- like, specific heat capacity is unique to the identity of the substance. So no matter how much you have of it, you need that temperature.

Abigail_Hagen2G
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Re: Heat Capacity

Postby Abigail_Hagen2G » Sat Jan 25, 2020 9:28 pm

So, can you convert between specific and molar heat capacity?

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Re: Heat Capacity

Postby DLee_1L » Sat Jan 25, 2020 10:20 pm

YEs! Specific heat is J/(kg*K) and molar specific heat is J/(kg*m) so you would need to get the molar mass of the substance and do some dimensional analysis.

Noe BM 1J
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Re: Heat Capacity

Postby Noe BM 1J » Sat Jan 25, 2020 10:27 pm

Does this mean that Specific heat capacity will always be less than molar heat capacity since it's 1 gram vs. 1 mole?

Kayla Maldonado 1A wrote:Molar heat capacity is the amount of heat needed to raise the temperature of one mole of a pure substance by one degree Kelvin. Specific heat capacity is the amount of heat necessary to raise the temperature of one gram of a pure substance by one degree Kelvin.


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