Question

a power plant gas emission contains 17.4% carbon dioxide by volume. Measurements in the discharge stack indicate a temp of 83.5 °C and pressure of 1 atm.

A) what is the CO2 concentration in unit of ppmv?

B) what is the partial pressure of CO2 In atm?

C) what is the CO2 Concentration in g/m^3?

Answer 1

a)

volume of CO2 --> assume 1 Liter volum eso 0.174*1 = 0.174 Liters,. 174 mL of CO2

ppm by volume = mL/L = (174 ) / 1 = 174 ppm v

b)

Partial pressure of CO2 in atm

P total = 1 atm

P-CO2 = % CO2 * Ptotal = 0.174*1 = 0.174 atm of CO2

c)

CO2 in g/M3

assume a basif of 1 m3

so

17.4 --> 0.174 m3 of CO2

change to mol

PV = nRT

n = PV/(RT) = (1)(0.174 *10^3)/(0.082*(83.5+273))

n = 5.952 mol of CO2

mass = mol*MW = 5.952*44

mass = 261.888 g of CO2

CO2 = 261.888 g / 1m3 = 261.888 g/m3