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Gas

2,753 bytes added, 14:22, 23 January 2019
Example Calculations
: The [[Volume (Space)|volume]] of [[gas]] required or [[product|produced]] in a [[Chemical Reaction|chemical reaction]] can be calculated from the [[mass]] of the [[gas]] and its [[Relative Formula Mass]].
====Example Calculations====
Since 1 [[mole]] of gas is 24 dm<sup>3</sup> then 12dm<sup>3</sup> is 0.5 [[mole]]s of [[gas]], 6dm<sup>3</sup> is 0.25dm<sup>3</sup>.
{| class="wikitable"
|+ Finding the Volume of Gas
|-
| style="height:20px; width:200px; text-align:center;" |'''Calculate the [[Volume (Space)|volume]] of 4g of [[Hydrogen]] [[gas]].'''
[[Volume (Space)|Volume]] = 30dm<sup>3</sup>
|}
 
{| class="wikitable"
|+ Finding the Mass of Gas from the Volume
|-
| style="height:20px; width:200px; text-align:center;" |'''Calculate the [[mass]] of 12dm<sup>3</sup> of [[Hydrogen]] [[gas]].'''
| style="height:20px; width:200px; text-align:center;" |'''Calculate the [[mass]] of 36dm<sup>3<sup> of [[Nitrogen]] [[gas]].'''
| style="height:20px; width:200px; text-align:center;" |'''Calculate the [[mass]] of 18dm<sup>3</sup> of [[Ethane]] [[gas]].'''
|-
| style="height:20px; width:200px; text-align:center;" |1.'''Find the [[Relative Formula Mass]] of the [[gas]].'''
 
[[Chemical Formula]] of [[Hydrogen]] = H<sub>2</sub>
 
[[Relative Atomic Mass]] of [[Hydrogen]] = 1g
 
[[Relative Formula Mass]] of H<sub>2</sub> = 2g
 
| style="height:20px; width:200px; text-align:center;" |1.'''Find the [[Relative Formula Mass]] of the [[gas]].'''
 
[[Chemical Formula]] of [[Nitrogen]] = N<sub>2</sub>
 
[[Relative Atomic Mass]] of [[Nitrogen]] = 14g
 
[[Relative Formula Mass]] of N<sub>2</sub> = 28g
| style="height:20px; width:200px; text-align:center;" |1.'''Find the [[Relative Formula Mass]] of the [[gas]].'''
 
[[Chemical Formula]] of [[Ethane]] = C<sub>2</sub>H<sub>6</sub>
 
[[Relative Atomic Mass]] of [[Hydrogen]] = 1g
 
[[Relative Atomic Mass]] of [[Carbon]] = 12g
 
[[Relative Formula Mass]] of C<sub>2</sub>H<sub>6</sub> = 30g
|-
| style="height:20px; width:200px; text-align:center;" |'''2. Calculate the number of [[mole]]s of [[gas]].'''
 
[[Volume (Space)|Volume]] = 24 x (number of moles)
 
12 = 24 x (number of moles)
 
Number of moles = 12/24
 
Number of moles = 0.5
| style="height:20px; width:200px; text-align:center;" |'''2. Calculate the number of [[mole]]s of [[gas]].'''
 
[[Volume (Space)|Volume]] = 24 x (number of moles)
 
36 = 24 x (number of moles)
 
Number of moles = 36/24
 
Number of moles = 1.5
| style="height:20px; width:200px; text-align:center;" |'''2. Calculate the number of [[mole]]s of [[gas]].'''
 
[[Volume (Space)|Volume]] = 24 x (number of moles)
 
12 = 24 x (number of moles)
 
Number of moles = 18/24
 
Number of moles = 0.75
|-
| style="height:20px; width:200px; text-align:center;" |'''3. Find the [[mass]] of [[gas]] from the number of [[mole]]s.'''
 
No. [[Mole]]s = <math>\frac{Mass}{M_r}</math>
 
0.5 = <math>\frac{Mass}{2}</math>
 
Mass = <math>0.5\times2</math>
 
Mass = 1g
[[Volume (Space)|Volume]] = 48dm<sup>3</sup>
| style="height:20px; width:200px; text-align:center;" |'''3. Find the [[mass]] of [[gas]] from the number of [[mole]]s.'''
 
No. [[Mole]]s = <math>\frac{Mass}{M_r}</math>
 
1.5 = <math>\frac{Mass}{28}</math>
 
Mass = <math>1.5\times28</math>
 
Mass = 42g
| style="height:20px; width:200px; text-align:center;" |'''3. Find the [[mass]] of [[gas]] from the number of [[mole]]s.'''
 
No. [[Mole]]s = <math>\frac{Mass}{M_r}</math>
 
0.75 = <math>\frac{Mass}{30}</math>
 
Mass = <math>0.75\times30</math>
 
Mass = 22.5g
|}