Question

What is the gas pressure within a cylinder if there is 5.0 g of co2 gas in a 10 L cylinder at 25 OC inside it?

Answer 1

P V = N R T Ideal gas equation

1 mole CO2 = 12 + 32 = 44 g

5 g = 5 / 44 = .114 moles

One definition of R is R = .08207 L-Atm / mole-deg K

P = .114 * .08207 * 298 / 10 = .279 Atmosphere

One needs to use care in using R in terms of other values given