Molar volume of gases

question 1

(PUC-MG) Under appropriate conditions, acetylene gas (C₂H_2(g)) and hydrochloric acid react to form vinyl chloride, C₂H₃Cl_(g). This substance is used to produce polyvinyl chloride (P.V.C.) – plastic – and has recently been found to be carcinogenic. The reaction in the formation of C₂H₃Cl can be represented by the equation:

Ç₂H_2(g) + 1 HCl_(here) → C₂H₃Cl_(g)

When 2 mol of vinyl chloride are obtained, the volume of acetylene gas consumed in the CNTP (0°C and 1 atm) is equal to:

a) 11.2 L

b) 22.4 L

c) 33.6 L

d) 44.8 L

e) 89.2 L

question 2

The complete combustion reaction of acetone can be represented by the following equation:

Ç₃H₆O_(v) + O_2(g) → CO_2(g) + H₂O_(v)

Consider this reaction carried out under a pressure of 100,000 Pa and at a temperature of 17 °C and calculate the volume of carbon dioxide, CO_2(g), obtained at the complete burn of 3.0. 10²⁶ propanone molecules, C₃H₆O_(v).

a) 22.4 L.

b) 21.93 L.

c) 650.32 L.

d) 25 L.

e) 36180 L

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