People buying food in sealed bags at high elevations often notice that the bags are puffed up because the air inside has expanded. A bag of pretzels was packed at a pressure of 1.01 atm and a temperature of 21.0°C. When opened at a summer picnic in Santa Fe, New Mexico, at a temperature of 31.0°C, the volume of the air in the bag is 1.40 times its original volume. What is the pressure of the air (in atm)?

The pressure in Santa Fe, New Mexico is 0.746atm

Explanation:

You can solve this question using combined gas law:

P₁V₁ / T₁ = P₂V₂ / T₂

Where P is pressure,

V is volume,

and T is absolute temperature in K for 1, initial state and, final states.

The initial conditions are:

P₁ = 1.01atm

V₁ = 1

T₁ = 21.0°C + 273.15K = 294.15K

And final conditions are:

P₂ = Our unknown

V₂ = 1.4

T₂ = 31.0°C + 273.15K = 304.15K

Replacing:

P₁V₁ / T₁ = P₂V₂ / T₂

1.01atm*1 / 294.15K = P₂*1.4 / 304.15K

P₂ = 0.746atm

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.