Question

what volume in gas would be produced by the complete reaction of solid at stp according to the following reaction?remember mol of an ideal gas has a volume of lat stp.

Answer 1

3.648 liters of volume in gas would be produced by the complete reaction of solid at STP according to the reaction as 1 mole of an ideal gas has a volume of 22.4 L at STP.

How is the volume in gas calculated?

The given reaction is

$2 Al(s) + 6 HCl (aq)$ = $2AlCl$₃($aq$)$+H$₂($g$)

1mole of ideal gas is 22.4L

Here we have to convert the mass of Al to moles.

We know, Number of moles = Mass/Molar mass

Mass of Al = 2.93 g

Molar mass of Al = 26.98 g

Therefore, No. of moles = 2.93 g/26.98 g = 0.108 moles

The molar ratio of Al to H₂ is 2:3

As, 2 moles of Al can produce 3 moles of H₂

Then, 0.108 moles of Al can produce

(0.108 × 3)/ 2  

= 0.163 moles of H₂

Now by applying the Ideal Gases Law to calculate the volume that is been produced throughout the reaction at STP ,

The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atmosphere.

1 atm × V = 0.163 mol × 0.082L.atm(mol.K)⁻¹ × 273K

Hence,

V = (0.163 mol × 0.082 L.atm(mol.K)⁻¹ × 273K) / 1atm

V = 0.013366 × 273

Therefore, the Volume is 3.648 L

What is STP?

In chemistry, STP stands for Standard Temperature and Pressure. STP is most commonly used when doing gas calculations. B. Gas Density. The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atmosphere. This is the freezing point of pure water at atmospheric pressure at sea level.

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