HW 4.19

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Hannah Lee 2F
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HW 4.19

Postby Hannah Lee 2F » Fri Feb 07, 2020 7:06 pm

Calculate the molar kinetic energy (in joules per mole) of Kr(g) at (a) 55.85 8C and (b) 54.85 8C. (c) The difference between the answers to parts (a) and (b) is the energy per mole that it takes to raise the temperature of Kr(g) by 1.00 8C. What is the value of the molar heat capacity of Kr(g)?

I used the equation Um = 3/2nRT for both (a) and (b), with R = 8.314 J/mol x K and T converted to K. For 4.19, I got (a) 4101.3 J/mol, (b) 4113.8 J/mol, but it doesn't seem to match up with the solutions manual. Can someone point out where I went wrong?

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Re: HW 4.19

Postby 705302428 » Fri Feb 07, 2020 8:06 pm

Section 4.C.3 from the textbook might be helpful to look at.

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