Talking about ideal gases, we can espress the following relations:
This table tells us that:
1. When temperature is constant, pressure and volume are inversely proportional. This means that when pressure decreases, volume increases and when pressure increases, volume decreases.
2. When pressure is constant, volume and temperature are directly proportional. This means that if volume increases, temperature increases and if volume decreases, temperature also does.
3. When volume is constant, pressure and temperature are directly proportional. This means that if pressure increases, temperature increases and if presure decreases, temperature also does.