Heat Capacities

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Phi Phi Do 2E
Posts: 27
Joined: Fri Sep 29, 2017 7:05 am

Heat Capacities

Postby Phi Phi Do 2E » Tue Jan 16, 2018 7:49 pm

How do you differentiate molar heat capacity from specific heat capacity?

Rana YT 2L
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

Re: Heat Capacities

Postby Rana YT 2L » Tue Jan 16, 2018 8:04 pm

the molar heat capacity is the amount of heat needed to raise the temperature of 1 mole of a substance by 1 degree Celsius or 1 kelvin.
the specific heat capacity is the amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree celsius or 1 kelvin

ConnorThomas2E
Posts: 57
Joined: Fri Sep 29, 2017 7:04 am

Re: Heat Capacities

Postby ConnorThomas2E » Tue Jan 16, 2018 8:07 pm

Molar heat capacity is the heat required to raise the temperature of a mol of the substance, while the specific heat capacity is the heat required to raise hte temperature of a gram of the substance.

Sarah Rutzick 1L
Posts: 50
Joined: Tue Oct 10, 2017 7:13 am

Re: Heat Capacities

Postby Sarah Rutzick 1L » Tue Jan 16, 2018 9:08 pm

Molar heat capacities and specific heat capacities are virtually the same thing, just with different units. If you are given moles of a substance, you can easily convert to grams of the substance and vice versa.

Morgan Baxter 1E
Posts: 50
Joined: Thu Jul 27, 2017 3:00 am

Re: Heat Capacities

Postby Morgan Baxter 1E » Tue Jan 16, 2018 9:26 pm

It is important that you understand both, because different problems will give you different units to work with. For example, if the problem gives you mass of iron in grams, use the specific heat (since that is in terms of grams). If you only have access to the molar heat capacity and are given iron in grams, convert grams of iron to moles of iron and then use the molar heat capacity.

Beza Ayalew 1I
Posts: 58
Joined: Fri Sep 29, 2017 7:07 am

Re: Heat Capacities

Postby Beza Ayalew 1I » Wed Jan 17, 2018 1:06 am

Is there one that is more commonly given in problems or are they used equally?

Alyssa Pelak 1J
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Re: Heat Capacities

Postby Alyssa Pelak 1J » Wed Jan 17, 2018 1:51 pm

I don't believe one is used more than the other. It just depends on what the given units are in the problem.


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