1. What is the Ideal Gas Law?

The Ideal Gas Law (P = nRT/V) describes the relationship between pressure (P), volume (V), temperature (T), and number of moles (n) of an ideal gas. It combines Boyle's Law, Charles's Law, and Avogadro's Law into one fundamental equation.

2. How Does the Calculator Work?

The calculator uses the Ideal Gas Law equation:

Where:

• \( P \) — Pressure (atm)
• \( n \) — Number of moles of gas
• \( R \) — Ideal gas constant (0.0821 L·atm/mol·K)
• \( T \) — Temperature in Kelvin
• \( V \) — Volume in liters

Explanation: The equation shows that pressure is directly proportional to the number of moles and temperature, and inversely proportional to volume.

3. Importance of Pressure Calculation

Details: Accurate pressure calculations are essential for chemical reactions, industrial processes, laboratory experiments, and understanding gas behavior under different conditions.

4. Using the Calculator

Tips: Enter the number of moles (must be > 0), temperature in Kelvin (must be > 0), and volume in liters (must be > 0). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the value of R in other units?
A: R can be 8.314 J/mol·K, 1.987 cal/mol·K, or 62.364 L·Torr/mol·K depending on the units needed.

Q2: When does the ideal gas law not apply?
A: At high pressures or low temperatures where gas molecules interact significantly, or for real gases with large molecular volumes.

Q3: How do I convert Celsius to Kelvin?
A: Add 273.15 to the Celsius temperature (K = °C + 273.15).

Q4: What are typical pressure values in chemistry?
A: Standard pressure is 1 atm (101.325 kPa). Lab conditions often range from 0.5-2 atm.

Q5: Can I use this for mixtures of gases?
A: Yes, n would represent the total moles of all gas components (Dalton's Law of Partial Pressures).