1. What is the Pressure-Temperature Relationship?

The pressure-temperature relationship describes how the pressure of a gas changes with temperature when volume is held constant (Gay-Lussac's Law). This calculator helps determine final pressure based on temperature sensor data.

2. How Does the Calculator Work?

The calculator uses the pressure-temperature relationship equation:

Where:

• \( P_1 \) — Initial pressure (Pa)
• \( P_2 \) — Final pressure (Pa)
• \( T_1 \) — Initial temperature (K)
• \( T_2 \) — Final temperature (K)

Explanation: The equation shows that pressure is directly proportional to temperature when volume is constant.

3. Importance of Pressure Calculation

Details: Accurate pressure calculation is crucial for gas systems, HVAC design, industrial processes, and scientific experiments where temperature changes affect system pressure.

4. Using the Calculator

Tips: Enter initial pressure in Pascals (Pa), initial and final temperatures in Kelvin (K). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for temperature?
A: Temperature must be in Kelvin (K) for this calculation. Convert from Celsius by adding 273.15.

Q2: Does this work for all gases?
A: This relationship holds for ideal gases. Real gases may show slight deviations, especially at high pressures or low temperatures.

Q3: What if volume changes?
A: If volume changes, you would need to use the combined gas law that accounts for both pressure and volume changes.

Q4: How accurate is this calculation?
A: The calculation is theoretically exact for ideal gases at constant volume. Accuracy depends on your temperature sensor precision.

Q5: Can I use this for absolute and gauge pressure?
A: The equation works with absolute pressure values. For gauge pressure, you would need to account for atmospheric pressure.