Answer to Question #176578 in Chemistry for Iliana Anavic Cruz

Question

A sample of propane occupies 250.0 L at 125 kPa and 38°C. Find its volume at 100.0 kPa and 95°C. 

Answer 1

pV = nRT

R = 8.314 4621 L kPa K⁻¹ mol⁻¹

1) 125 x 250 = n x 8.314 x (38+273)

n (C₃H₈) = (125 x 250) / (8.314 x (38+273)) = 12.09 mol

2) 100 x V = 12.09 x 8.314 x (95+273)

V (C₃H₈) = (12.09 x 8.314 x (95+273)) / 100 = 369.77 L