Question

Nitrogen dioxide has a volume of 775ml at STP. What is the new pressure in atmospheres if the volume changes to 615ml and the temperature to 25 degrees Celsius?

Answer 1

P₂ = 1.4 atm

Step-by-step explanation:

Given data:

Initial volume = 775 mL

Initial pressure =1 atm

Initial temperature = 273 K

Final temperature = 25°C (25+273 = 298 K)

Final volume = 615 mL

Final pressure = ?

Formula:

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₂ = P₁V₁ T₂/ T₁ V₂

P₂ = 1 atm. 775 mL . 298 K / 273 K. 615 mL

P₂ = 230950 atm / 167895

P₂ = 1.4 atm