Comparing SHC

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chloewinnett1L
Posts: 55
Joined: Fri Sep 28, 2018 12:20 am

Comparing SHC

Postby chloewinnett1L » Thu Jan 31, 2019 12:33 am

Would a molecule with more atoms have a higher specific heat capacity than a molecule with fewer atoms? Or would they have the same specific heat capacity but different molar heat capacities?

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Comparing SHC

Postby Tarika Gujral 1K » Thu Jan 31, 2019 7:36 am

Not necessarily:
Water SHC = 4.184
Benzene SHC = 1.74

Benzene has more atoms than water, yet its SHC is less than water. SHC depends on the types of bonds, not necessarily the amount of atoms. Molar heat capacity is dependant on amount of each substance, but again, the types of bonds mostly determine which one is higher.

Brian Chang 2H
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Comparing SHC

Postby Brian Chang 2H » Thu Jan 31, 2019 10:25 am

Not necessarily. SHC is just the heat capacity of a substance divided by its mass (in grams).

Molar heat capacity would be more accurate if you were concerned about the number of atoms being heated, but intermolecular forces have a much greater effect on the enthalpies of vaporization and such.

Letizia Ye 4F
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: Comparing SHC

Postby Letizia Ye 4F » Thu Jan 31, 2019 1:10 pm

Not necessarily, SPC of a substance depends on properties such as intermolecular forces. SPC is just a measure of how many Joules it takes to raise 1 gram of a substance by 1 degree Celsius.


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