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Change in internal energy equation

Posted: Thu Jan 31, 2019 10:33 pm
by Amy Lefley 1J
When calculating the change in internal energy of a system, I know you can use the equation q=C*deltaT. Why is mass or moles not included in this equation? Are there other equations that can be used?

Re: Change in internal energy equation

Posted: Thu Jan 31, 2019 10:46 pm
by melodyzaki2E
I think that's the equation for calculating heat. The equations for specific heat capacity and molar heat capacity include moles and grams I think?

Re: Change in internal energy equation

Posted: Fri Feb 01, 2019 10:01 am
by Danny Elias Dis 1E
If you are asking about calculating molar heat capacity at a constant pressure, use q = n(Cp)(deltaT), where n is the number of moles. Similarly, for a constant volume use Cv. Keep in mind that these can only be used for gases.