Extensive v. Intensive Property of Heat Capacities

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Layal Suboh 1I
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Extensive v. Intensive Property of Heat Capacities

Postby Layal Suboh 1I » Tue Feb 12, 2019 10:15 pm

Why are heat capacities extensive, but specific and molar heat capacities intensive properties?

Becky Belisle 1A
Posts: 81
Joined: Fri Sep 28, 2018 12:18 am

Re: Extensive v. Intensive Property of Heat Capacities

Postby Becky Belisle 1A » Tue Feb 12, 2019 10:17 pm

Heat capacities change based on the amount of particles. Specific and molar heat capacities are for specified quantities of particles, so they are intensive.

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

Re: Extensive v. Intensive Property of Heat Capacities

Postby chloewinnett1L » Tue Feb 12, 2019 10:34 pm

Look at the units- specific heat capacity is typically in units of J/g*C, and molar heat capacity is typically in units of J/Kmol. This means that in order to find the actual amount of heat energy in Joules, you need to multiply SHC by temperature and mass, and you need to multiply MHC by temperature and # of moles. With generic heat capacity, you only need to multiply by temperature to get Joules.

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

Re: Extensive v. Intensive Property of Heat Capacities

Postby Letizia Ye 4F » Fri Feb 15, 2019 8:50 pm

The value of the heat capacity will change depending on how much of the substance there is, while the specific heat capacity will always remain constant regardless of how much stuff you have.


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