# How much carbon dioxide is generated when 2.8 g of ethylene are burned?

October 9, 2021 | education

| Given:

m (C2H4) = 2.8 g

Find:

V (CO2) -?

Solution:

1) Write the reaction equation:

C2H4 + 3O2 => 2CO2 ↑ + 2H2O;

2) Calculate the molar mass of C2H4:

M (C2H4) = Mr (C2H4) = Ar (C) * 2 + Ar (H) * 4 = 12 * 2 + 1 * 4 = 28 g / mol;

3) Calculate the amount of substance C2H4:

n (C2H4) = m (C2H4) / M (C2H4) = 2.8 / 28 = 0.1 mol;

4) Determine the amount of substance CO2:

n (CO2) = n (C2H4) * 2 = 0.1 * 2 = 0.2 mol;

5) Calculate the volume of CO2:

V (CO2) = n (CO2) * Vm = 0.2 * 22.4 = 4.48 liters.

Answer: The CO2 volume is 4.48 liters.

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