Question

Consider the following vapour pressure-composition graph, $SP$ is equal to

• A. PQ + RS
• B. QR + RS
• C. SR + SQ
• D. PQ + QR

Answer 1

Answer: (C)

$P_S=P_A^0\cdot x_A+P_B^0\cdot x_B$
$SP=P_A^0\times 0.2+0.8\times P_B^0$
$SP=SR+SQ$