Calcium carbonate also known as limeston is decomposed by he

Calcium carbonate, also known as limeston, is decomposed by heating into calcium oxide and carbon dioxide. A sample of calcium carbonate is decomposed and the CO2 is collected in a 0.15L flask. At 72°C, the CO2 collected was found to have a pressure of 1.3atm. How many moles of Co2 were collected? Correct Answer: 0±2%

Solution

Use ideal gas equation for calculation of mole of gas

Ideal gas equation

PV = nRT             where, P = atm pressure= 1.3 atm,

V = volume in Liter = 0.15 L

n = number of mole = ?

R = 0.08205L atm mol^-1 K^-1 =Proportionality constant = gas constant,

T = Temperature in K = 72⁰C = 273.15+ 72 = 345.15 K

We can write ideal gas equation

n = PV/RT

Substitute the value

n = (1.3X 0.15)/(0.08205 X 345.15) = 0.006886 mole

0.006886 mole of CO₂ collected