Combined gas law states that "the ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant".
Temperature ,T₁ = 20⁰C = 20+273.15K = 293.15K
Temperature, T₂ = 40⁰C = 40+273.15K = 313.15K
According to combined gas law,
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
Where, n is moles of substance
P is pressure
P and n are considered to be a constant.
Thus, V₁/T₁ = V₂/T₂
V₁ = V₂T₁/T₂
V₁ = ?,
V₂ = 585mL = 585mL x 293.15K/313.15K
V₁ = 548mL
Hence, the original volume of the helium gas is 548mL.
What is pressure?
"Pressure is the force of all the gas particle/wall collisions divided by the area of the wall."
What is volume?
"Volume is the amount of space occupied by a substance."
What is temperature?
"Temperature is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius."
Know more about Combined gas law here
https://brainly.com/question/13154969
#SPJ2
