Question

Find the volume of a gas at standard pressure if its volume at 780 mm Hg is 80 ml​

Answer 1

0.082L or 82mL

Step-by-step explanation:

Given parameters:

Pressure of gas = 780mmHg;

760mmHg = 1atm

780mmHg =
`(780)/(760)` = 1.03atm

Volume of gas = 80ml = 0.08L

Standard pressure = 1atm

Unknown:

Volume of gas = ?

Solution:

To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of gas is inversely proportional to the pressure if the temperature is constant".

Mathematically;

P₁ V₁ = P₂ V₂

P and V are temperature values

1 and 2 are initial and final states;

Insert the parameters and solve;

1.03 x 0.08 = 1 x V₂

V₂ = 0.082L or 82mL