Question

An unknown gas has a volume of 20L at 140K. What is its volume at STP? Be sure to show the setup and the final

answer and unit.
Show Your Work

Answer 1

v₂ = 39L

Step-by-step explanation:

Given parameters:

Initial volume of gas = 20L

Initial temperature = 140K

Unknown:

Final volume = ?

Solution:

Since the standard temperature of any gas is 273K, the final temperature is this 273K;

Applying Charles's law:

`(v_(1) )/(T_(1) )` =
`(v_(2) )/(T_(2) )`

v and T are volume and Temperature

`(20)/(140)` =
`(v_(2) )/(273)`

v₂ x 140 = 20 x 273

v₂ = 39L