Calculate the pressure of 33.5 g of carbon dioxide gas under 4.2 L container at 39.2 deg C. R = 0.0821 L atm/mol K.

Question

Formula to use: PV= nRT

This question is also involved with molar mass and convert any deg C into K.

Answer 1

PV = nRT

P = pressure = ?

V = volume in liters = 4.2 L

n = moles = 33.5 g CO2 x 1 mol CO2 / 44 g = 0.761 moles

R = gas constant = 0.0821 Latm/Kmole

T = temperature in Kelvin = 39.2 + 273 = 312.2

Solving for P

P = nRT / V = (0.761)(0.0821)(312) / 4.2

P = 4.6 atm (2 sig. figs,)