Question

- A child buys a balloon filled with 3.50 L ofhelium on a very hot day when it's 39.0°C out-side. Assuming a constant pressure, what is thevolume of the balloon when the child bringsthe balloon home to an air-conditioned houseat 20.0°C?borg

Answer 1

In this question, we have a situation where a gas is in constant pressure but changing its volume and temperature, and the best way to solve a situation like this, is through the Charles's gas law formula, which shows the relationship between volume and temperature when the pressure is constant. The formula is:

V1/T1 = V2/T2

We have:

V1 = 3.50 L

T1 = 39.0°C, but we need this value in Kelvin, 312 K

V2 = ?

T2 = 20°C, or 293 K

Now we add these values into the formula:

3.50/312 = V2/293

V2 = 3.29 Liters of the new volume