The initial volume of the gas : 6.43 L
Given
Temperature :
T₁=27+273 = 300 K
T₂=77+273 = 350 K
Volume : V₂=7.5 L
Required
The initial volume=V₁
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₁=(V₂ x T₁)/T₂
V₁=(7.5 L x 300 K)/350 K
V₁ = 6.43 L