Question

the molar heat capacity of CD2O is 10 Calstock. at 1000k.The change in entropy associated with cooling of 32g of CD2O vapour from 1000k to 100k at constant pressure will be​

Answer 1

Answer:

change in entropy=Delta s =$C_{p} ln(T_{2} -T_{1} )-Rln(P_{2} /P_{1} )$

but P1=P2

Delta S=$C_{p} ln(T_{2} /T_{1} )=10ln(100/1000)$

=-10ln10=-10*2.303log10

=-23.03cal/degree