Question

Carbon dioxide (CO2) is initially at 11.09 MPa, 330°K and then is compressed to 430°K and 22.17 MPa. a Treating carbon dioxide as an ideal gas: Find the change in specific volume between the initial & final states Find the change in enthalpy between the initial & final states per kmol Find the change in entropy between the initial & final states per kmol b Treating carbon dioxide as a real gas: Use the generalized charts to determine the change in specific volume, and the change in enthalpy and entropy per kmol. Show your factors on the appropriate charts (3 charts)

Answer 1

Treating CO₂ as ideal ras. Hence it must obey. Cas law pe=RT RT P charge in specific volume b/w initial and firal state U-U2 = R Tq RT2 Pop P RAT T2 PA P2 -0.287 1330 430 11.0px10 22-172103 = 0.387 (0.029756 -0.019398) - 0.287X0.010360 2-973 4x10-3 mol kg Since Enthalpy, h= utpo change in Enthalpy = h the -fuz tez les cu P18) =ch-ul) + (A-PU) r(72-1))+ ( P2 Vq - PR 3 m3/kg ( Pyyy

0.487(490-290)|(2717490% 5560x480) 9.5399x yo -(11.09x18x8.5390 =:71.8+(123.398 - 94.707) 71.87 28.69 = 100.49 kj / kg. since no, of moles (n) m is not given herce, we can not calcealate Erthalpy per M m=mass M= Molecular Mass anit mole. 'Charge in Entropy = U= =U= Cv di 12-10 Cv (Ti 0.718 ( 430 – 330) 20HP X 100 ( =71.8 kilkg. 6 Chast for Real gas is not provided: