Question

if a sample of oxygen gas occupies a volume of 2.15 At a pressure of 0.572 atm and a temperature of 25 c what volume would this sample occupy at STP

Answer 1

Answer:
1.126 L

Solution:

Let's assume the gas is behaving ideally, then initial and final states of given gas are given as,

P₁ V₁ / T₁ = P₂ V₂ / T₂ ---- (1)
Data Given;

P₁ = 0.572 atm

V₁ = 2.15 L

T₁ = 25 °C + 273 = 298 K

P₁ = 1.00 atm

V₂ = ?

T₂ = 0 °C + 273 = 273 K

Solving equation 1 for V₂,

V₂ = P₁ V₁ T₂ / T₁ P₂

Putting Values,

V₂ = (0.572 atm × 2.15 L × 273 K) ÷ (298 K × 1 atm)

V₂ = 1.126 L