a sample of freon-12 occupies 25.5 litters at 28 celsius find its volume at 15 degree celcius when the pressure is kept constant

Note: L is liters; the second celsius is not correct.

Use (V1/T1) = (V2/T2)
Remember to change T to kelvin.

To solve this question, we can make use of the combined gas law equation, which relates the initial and final volume, temperature, and pressure of a gas sample when the pressure is kept constant. The equation is as follows:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where:
P₁ = Initial pressure (constant)
V₁ = Initial volume (given)
T₁ = Initial temperature (given)
P₂ = Final pressure (constant)
V₂ = Final volume (to be calculated)
T₂ = Final temperature (given)

Now, let's plug in the given values into the equation and solve for V₂:

P₁ = P₂ (since pressure is constant)
V₁ = 25.5 liters (given)
T₁ = 28 degrees Celsius (given)
T₂ = 15 degrees Celsius (given)

Thus, the equation becomes:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Now let's solve for V₂:

V₂ = (P₁ * V₁ * T₂) / (P₂ * T₁)

As we substitute the given values into the equation, we get:

V₂ = (P₁ * V₁ * T₂) / (P₂ * T₁)
V₂ = (P₁ * 25.5 * 15) / (P₂ * 28)

Since the pressure is constant, we can simplify the equation further:

V₂ = (25.5 * 15) / 28

Evaluating this equation gives us the volume at 15 degrees Celsius when the pressure is kept constant.