Specific Heat and Molar Heat Capacity

Moderators: Chem_Mod, Chem_Admin

Alex Tchekanov Dis 2k
Posts: 118
Joined: Sat Aug 24, 2019 12:16 am

Specific Heat and Molar Heat Capacity

Postby Alex Tchekanov Dis 2k » Mon Jan 27, 2020 3:47 pm

When would we have to know which one of the two to use?

Brian_Ho_2B
Posts: 221
Joined: Fri Aug 09, 2019 12:16 am

Re: Specific Heat and Molar Heat Capacity

Postby Brian_Ho_2B » Mon Jan 27, 2020 4:02 pm

You want to use either value depending on the information present. The problem would typically provide you with one or the other, and you may have to convert a value in moles to grams or the other way around. These are two different values; specific heat is joules per gram per degree Kelvin and Molar heat capacity is joules per mole per degree Kelvin.

Jada Brown 2H
Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

Re: Specific Heat and Molar Heat Capacity

Postby Jada Brown 2H » Mon Jan 27, 2020 4:26 pm

You would make this decision based on what the question was asking for/whether you were given moles or grams.

Brian Tangsombatvisit 1C
Posts: 119
Joined: Sat Aug 17, 2019 12:15 am

Re: Specific Heat and Molar Heat Capacity

Postby Brian Tangsombatvisit 1C » Mon Jan 27, 2020 6:03 pm

The units of specific heat capacity and molar heat capacity can vary in terms of temperature units, but they are distinct based on whether there are grams or moles in the denominator. Joules or kilojoules can be in either numerator, and units of kelvin or celsius are also interchangeable in both. I believe the standard or general term that you would use more often is specific heat capacity, which uses grams over moles.

505306205
Posts: 97
Joined: Thu Jul 25, 2019 12:15 am

Re: Specific Heat and Molar Heat Capacity

Postby 505306205 » Mon Jan 27, 2020 8:51 pm

Heat capacity is an extensive property while specific heat capacity is an intensive property. Intensive properties are more important to us.


Return to “Heat Capacities, Calorimeters & Calorimetry Calculations”

Who is online

Users browsing this forum: No registered users and 1 guest