Chemistry Help please????

Question

Determine the pressure exerted in a 7.25L flask containing 0.475 mol N2 @ 25degrees Celsius.

A 7.35 mL sample of argon is heated from 25degrees C to 100 degrees C. If the pressure remains constant, determine the final volume of the gas.

Thank you!

Answer 1

1.  Use PV = nRT and solve for P

V = 7.25L

n = 0.475

R = 0.0821 L-atm/mol-K

T = 298K

P = (0.475mol) (0.0821 L-atm/mol-K) (298K)/ (7.25L)

P = 1.60 atm



2.  Use V1/T1 = V2/T2

V1 = 7.35mL

T1 = 298K

V2 = x

T2 = 373K

7.35mL/298K = V2/373K

V2 = 9.20L