Charles's law states that at constant pressure, the volume of a gas is directly proportional to its absolute temperature (in Kelvin). This means that as one increases, the other increases as well.
Given this, the correct statements reflecting the direct relationship between volume and temperature are:
- As volume increases, temperature increases.
- As temperature increases, volume increases.
So, you should select the following options:
- As volume increases, temperature increases.
- As temperature increases, volume increases.