Question

A Freon leak in the air-conditioning system of a large building releases 17 kg of CHF2Cl per month.If the leak were allowed to continue, how many kilograms of Cl would be emitted into the atmosphere each year?

Answer 1

17 Kg of CHF2Cl is released per month

So,

amount of CHF2Cl in a year = 17*12 = 204 Kg

Molar mass of CHF2Cl,

MM = 1*MM(C) + 1*MM(H) + 2*MM(F) + 1*MM(Cl)

= 1*12.01 + 1*1.008 + 2*19.0 + 1*35.45

= 86.468 g/mol

mass(CHF2Cl)= 204 Kg

= 204000 g

use:

number of mol of CHF2Cl,

n = mass of CHF2Cl/molar mass of CHF2Cl

=(2.04*10^5 g)/(86.47 g/mol)

= 2.359*10^3 mol

This is number of moles of CHF2Cl

one mole of CHF2Cl contains 1 moles of Cl

use:

number of moles of Cl = 1 * number of moles of CHF2Cl

= 1 * 2.359*10^3

= 2.359*10^3

Molar mass of Cl = 35.45 g/mol

use:

mass of Cl,

m = number of mol * molar mass

= 2.359*10^3 mol * 35.45 g/mol

= 8.364*10^4 g

= 83.6 Kg

Answer: 83.6 Kg