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Q.

Ethanol burns in excess oxygen to form CO2(g) and H2O(g) according to this balanced equation. 

C2H5OH(g)+3O2(g)2CO2(g)+3H2O(g)

What value is closest to the volume of CO2(g) measured at 200K and 1atm, produced from the combustion of 0.25mol of C2H5OH(g) ?

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a

15 L

b

5 L

c

8 L

d

10 L

answer is B.

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Detailed Solution

It is known that,

PCO2=nCO2×RT

1×VCO2=0.5×0.0821×2008.2L

= 8 L

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