1. What is the Ideal Gas Law Pressure Formula?

Definition: This calculator computes the pressure of an ideal gas using the ideal gas law equation.

Purpose: It helps chemistry students and professionals determine the pressure of a gas when other parameters are known.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Pressure (Pascals)
• \( n \) — Amount of substance (moles)
• \( R \) — Ideal gas constant (8.314 J/mol·K)
• \( T \) — Temperature (Kelvin)
• \( V \) — Volume (cubic meters)

Explanation: The product of moles, gas constant, and temperature is divided by volume to calculate pressure.

3. Importance of Pressure Calculation

Details: Accurate pressure calculations are essential for chemical reactions, gas storage, and various industrial processes.

4. Using the Calculator

Tips: Enter the amount of substance in moles, temperature in Kelvin, volume in cubic meters, and gas constant (default 8.314 J/mol·K). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal gas constant?
A: The ideal gas constant (R) is 8.314 J/mol·K in SI units. It relates energy scale to temperature scale for a mole of particles.

Q2: Why must temperature be in Kelvin?
A: The Kelvin scale is an absolute temperature scale where 0 K represents absolute zero, making it necessary for gas law calculations.

Q3: How accurate is this for real gases?
A: This is accurate for ideal gases under normal conditions. For real gases, especially at high pressures or low temperatures, more complex equations are needed.

Q4: Can I use different units?
A: Yes, but you'll need to adjust the gas constant value accordingly to match your units.

Q5: What if I get a negative result?
A: All input values must be positive. Negative results indicate invalid input values.