specific vs molar heat capacity


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lwon Dis2I
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specific vs molar heat capacity

Postby lwon Dis2I » Sat Feb 06, 2021 10:52 pm

What is the difference between specific and molar heat capacity? How do you know which one to use in a problem?

Nayra Gharpetian 3F
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Re: specific vs molar heat capacity

Postby Nayra Gharpetian 3F » Sat Feb 06, 2021 10:57 pm

specific heat capacity is the heat capacity in terms of grams present. molar heat capacity is the heat capacity in terms of moles present. it really just depends on what information is given in the problem

Jordi M 2I
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Re: specific vs molar heat capacity

Postby Jordi M 2I » Sat Feb 06, 2021 10:57 pm

Molar heat capacity can be thought of as a form of specific heat capacity. Specific heat capacity is the energy required to raise the temperature by 1 degree for a GRAM of that substance. Molar heat capacity is the energy required to raise the temperature by 1 degree for a MOLE of that substance.

ChihWei Chen 2C
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Re: specific vs molar heat capacity

Postby ChihWei Chen 2C » Sat Feb 06, 2021 11:00 pm

specific heat is the heat required to raise the temp. of 1g of substance by 1 degree Celsius (unit = J/g°C)
Molar heat capacity is the heat required to raise the temp. of 1 mol of substance by 1 degree Celsius (unit = J/mol°C)
Both are used to calculate heat, and the only difference is that specific heat is per grams, and molar heat is per moles. So I would say paying attention to the units when solving a problem would help.

Karl Yost 1L
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Re: specific vs molar heat capacity

Postby Karl Yost 1L » Sat Feb 06, 2021 11:30 pm

Heat capacity more generally refers to the amount of energy required to raise a given amount of a substance by a given temperature. Specific heat capacity describes the amount of energy required to raise 1g of a substance by 1K, while molar heat capacity denotes the amount of energy required to raise one mol of a substance by 1K.

Sabine Salvucci 2E
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Re: specific vs molar heat capacity

Postby Sabine Salvucci 2E » Sun Feb 07, 2021 2:38 am

Hello! Molar heat capacity is how much heat is necessary to raise the temperature of one mole of a pure substance by one degree. Specific heat capacity is a how much heat is necessary to raise the temperature of one gram of a pure substance by one degree. To know which one to use, just look at the units in the problem (moles=molar, mass=specific). Hope this helps!

Andersen Chu 2H
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Re: specific vs molar heat capacity

Postby Andersen Chu 2H » Sun Feb 07, 2021 3:08 am

The difference is in the units. Molar heat capacity tells you the energy need to change the temperature of a mol of substance, and specific heat capacity tells you the energy needed to change the temperature of a gram of a substance. You can tell because they will show you the units when giving you the value either by seeing g or mol. For when to use each, it depends on what we know in the problem. For example, if we are given the moles of a substance, chances are we are going to use molar heat capacity.

Jason_John_2F
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Re: specific vs molar heat capacity

Postby Jason_John_2F » Sun Feb 07, 2021 3:16 am

the difference between the two is that molar heat capacity is in terms of 1 mol and specific heat capacity is in terms of 1 grams

Susanna Givan 2B
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Re: specific vs molar heat capacity

Postby Susanna Givan 2B » Sun Mar 14, 2021 11:00 pm

If grams are given, you want to use specific heat capacity. If moles are given, you want to use molar heat capacity. Although, typically, you would have to convert to moles at the end of the problem anyway.

Mansi Solanki 3A
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Re: specific vs molar heat capacity

Postby Mansi Solanki 3A » Sun Mar 14, 2021 11:03 pm

The molar heat capacity is used when units are in terms of moles are included in the question while the specific heat capacity is used for problems that have units in terms of grams.

kristinalaudis3e
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Re: specific vs molar heat capacity

Postby kristinalaudis3e » Sun Mar 14, 2021 11:11 pm

molar heat capacity is the amount of energy needed to raise the temp of a mole of substance by 1 degree. specific heat capacity is the amount of energy needed to raise the temp of a gram of a substance by a degree

Queena Chu 3E
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Re: specific vs molar heat capacity

Postby Queena Chu 3E » Sun Mar 14, 2021 11:12 pm

Specific heat capacity is in units of 1g and molar heat capacity is in 1 mol.

Teti Omilana 1G
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Re: specific vs molar heat capacity

Postby Teti Omilana 1G » Sun Mar 14, 2021 11:14 pm

The difference is that molar heat capacity refers to 1 mol of a substance and specific heat capacity refers to 1 gram.

LovepreetSran_3H
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Re: specific vs molar heat capacity

Postby LovepreetSran_3H » Sun Mar 14, 2021 11:28 pm

Specific Heat refers to grams whereas molar heat capacity refers to moles.

austin-3b
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Re: specific vs molar heat capacity

Postby austin-3b » Sun Mar 14, 2021 11:36 pm

Specific is the amount per gram and molar is the amount per mole.

Amy Jordan 2A
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Re: specific vs molar heat capacity

Postby Amy Jordan 2A » Thu Jan 27, 2022 9:47 am

Hi, specific heat capacity is the heat required to raise the temperature in grams of a substance, while molar heat capacity is the heat required to raise the temperature in moles of a substance, so it's just a difference in units. It depends on which one to use based on the problem and what information they give you.

Clarence Clavite 2K
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Re: specific vs molar heat capacity

Postby Clarence Clavite 2K » Thu Jan 27, 2022 10:15 am

The problem you would be looking at would most likely give you grams or some kind of conversion to find grams or moles or a way to calculate moles. The difference is that specific heat is the heat required to raise the temperature by 1-degree celsius using grams. While molar heat capacity is the heat required to raise the temperature by 1-degree celsius using moles.


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