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01/10/2021 1:29 pm
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0.5 mole each of two ideal gases A(Cv,m = 5/2R) and B(Cv,m = 3R) are taken in a container and expanded reversibly and adiabatically, during this process temperature of gaseous mixture decreased from 350 K to 250 K. Find ΔH (in cal/mol) for the process:
(a) -100 R
(b) -137.5 R
(c) -375 R
(d) None of these
1 Answer
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01/10/2021 1:34 pm
(c) -375 R
Explanation:
ΔH = (n1Cp,m1 + n2Cp,m2)ΔT
= \(\Big(0.5 \times \frac{7}{2}R + 0.5 \times 4 R\Big)\)(-100)
= -375 R
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