0.5 mole each of two ideal gases A (C_(v.m)= (5)/(2)R) and B (C_(v.m)=3R) are taken in a container and expanded reversibly and adiabtically, during this process temperature of gaseous mixture decreases from 350K and 250K. Find DH (in cal/mol) for the process

0.5 mole each of two ideal gases A (C_(v.m)= (5)/(2)R) and B (C_(v.m)=

1.	0.5 mole each of two ideal gases A (C_(v.m)= (5)/(2)R) and B (C_(v.m)=3R) are taken in a container and expanded reversibly and adiabtically, during this process temperature of gaseous mixture decreases from 350K and 250K. Find DH (in cal/mol) for the process
Answer» `-100R` `-137.5R` `-375R` none of these Solution :In case of a mixture of gas `C_(P) = (n_(1)Cp_(1) + n_(2)Cp_(2))/(n_(1) n_(2)) = ((0.5) ((7)/(2)R)+ 0.5 (4R))/(1)` = 3.75R `DELTA H = nCp Delta T = 1 xx 3.75 xx (-100) = - 375R`