The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be_____________________? August 20, 2021February 7, 2019 by admin The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be_____________________? A. 0.8 B. 1C. 1.4 D. 1.8