Chemistry homework

Question

A ballon is filled to a volume of of 7.10 x 10^2 mL at a temperature of 24.0 degrees C. The ballon is then cooled at constant pressure to a temperature of 1.37 x 10^2 K. What is the final volume of the ballon? Answer in mL

Answer 1

Constant pressure requires Charles Law.

V1/T1 = V2/T2

V1 = 7.10x10² ml = 710 mls

T1 = 24.0 C + 273 = 297K

V2 = ?

T2 = 1.37x10² K = 137K

710 ml/297K = V2/137K

V2 = (710)(137)/297

V2 = 328 mls ( 3 sig. figs. )