A gas occupies 16.3 l at stp. what volume will it occupy at 735 torr and 57°c?

Use the equation PV=nRT to find no. of moles (n)

For this;

At STP

Pressure = P = 1 atm

Temperature=T = 273.16 K

Volume = V = 16.3 L = 16.3 dm³

R = 0.0821 dm³ atm K⁻¹ mol⁻¹

Now,

PV = nRT

(1) (16.3) = n (0.0821) (273.16)

n = 0.727 mol

Now, again using the same equation for

Pressure=P = 735 torr

Temperature=T = 57°C

T = 57+273 = 330 K

n = 0.727 mol (form previous calculation)

R = 62.4 dm³ torr K⁻¹ mol⁻¹

Now,

PV = nRT

(735) V = (0.727) (62.4) (330)

V = 20.37 dm³