Energy required for temperature raise  temperaturedependent specific heat capacityby davidray Tags: heat capacity, thermal 

#1
Oct1711, 06:03 AM

P: 7

Any help on this quistion would be greatly appreciated. I have no idea ho to answere it, and can't find anything in my nothes or books anywhere.
The temperaturedependent molar specific heat capacity at constant pressure of many substances is given by: c =a+2bT−cT^−2 For magnesium, the numerical values of the constants are: a=25.7, b=3.13x10^3, c=3.27x10^5 where c has units J/Kxmol Calculate the energy required to raise the temperature of 15g of Megnesium from 30 C to 300 C. I have tried using the formula to qenerate a specific heat capacity for each temperature, but just seem to get crazy numbers that don't make any sense! Thanks for the help! 



#2
Oct1711, 06:21 AM

HW Helper
P: 4,716

When S.H is a constant, c, then energy=c x delta T
which looks like what you'd get from integral of c from T1 to T2 So try integral of c from T1 to T2 where c is a function of T. 


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