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 absolute temperature scale (Kelvin) 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:

• \( T_1 \) — Initial temperature (Kelvin)
• \( V_1 \) — Initial volume (Liters)
• \( V_2 \) — Final volume (Liters)
• \( T_2 \) — Final temperature (Kelvin)

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

3. Importance of Charles' Law

Details: Charles' Law is crucial for understanding gas behavior, designing engines, predicting weather balloon behavior, and many industrial applications involving gases.

4. Using the Calculator

Tips: Enter all values in the correct units (temperature in Kelvin, volumes in liters). All values must be positive numbers.

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, making the proportional relationship valid.

Q2: What are the assumptions of Charles' Law?
A: It assumes constant pressure, ideal gas behavior, and a closed system with constant amount of gas.

Q3: Can I use Celsius instead of Kelvin?
A: No, you must convert Celsius to Kelvin first (K = °C + 273.15) as the relationship is only valid with absolute temperature.

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: Is this calculator accurate for real gases?
A: It works best for ideal gases at moderate temperatures and pressures. For real gases, corrections may be needed.