1. What is Charles' Law?

Charles' Law states that the volume of a given amount of gas is directly proportional to its temperature on the Kelvin scale when pressure is held constant. It's one of the fundamental gas laws in chemistry and physics.

2. How Does the Calculator Work?

The calculator uses Charles' Law equation:

Where:

• \( V1 \) — Initial volume (L)
• \( T1 \) — Initial temperature (K)
• \( T2 \) — Final temperature (K)
• \( V2 \) — Final volume (L)

Explanation: The equation shows the direct proportional relationship between volume and absolute temperature for an ideal gas at constant pressure.

3. Importance of Charles' Law

Details: Charles' Law helps predict how gases will behave when heated or cooled, with applications in meteorology, hot air balloons, and understanding basic gas behavior.

4. Using the Calculator

Tips: Enter initial volume in liters, temperatures in Kelvin. All values must be positive numbers. Temperature must be in absolute scale (Kelvin).

5. Frequently Asked Questions (FAQ)

Q1: Why must temperature be in Kelvin?
A: Kelvin is an absolute temperature scale where 0 K represents absolute zero. The law only works with absolute temperatures.

Q2: What are the limitations of Charles' Law?
A: It applies only to ideal gases at constant pressure. Real gases deviate from this behavior at high pressures or low temperatures.

Q3: How do I convert Celsius to Kelvin?
A: Add 273.15 to the Celsius temperature to get Kelvin. For example, 25°C = 298.15 K.

Q4: What happens if pressure changes?
A: Charles' Law doesn't apply. You would need to use the Combined Gas Law or Ideal Gas Law instead.

Q5: Can I use this for volume changes at constant temperature?
A: No, for volume changes at constant temperature, you would use Boyle's Law (P1V1 = P2V2).