## Heat Capacity of Ethane: 2011 Final Question 1C

lia sepanek
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### Heat Capacity of Ethane: 2011 Final Question 1C

why does ethane have a higher heat capacity than ethene?

Niharika Reddy 1D
Posts: 127
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Heat capacity of ethane: 2011 Final 1C

Heat capacity increases with molecular complexity. As more atoms are present in a molecule, there are more possible bond vibrations that can absorb added energy. In addition to having more atoms, ethane has a C-C single bond, which allows it to have rotational freedom, whereas ethene has a C-C double bond that makes it more rigid since double bonds don't allow rotation.

Chem_Mod
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### Re: Heat capacity of ethane: 2011 Final 1C

Great explanation Niharika!