THCa PSI Chart

Analyze pressure buildup during THCa decarboxylation in closed vessels

Safety Analysis: Calculate CO₂ pressure buildup during decarboxylation to ensure safe vessel operation. Based on ideal gas law and molecular stoichiometry.
Calculation Parameters
g
%
°F
fl oz
Frequently Asked Questions
How does this calculator work?

The calculator uses the ideal gas law and stoichiometry to predict CO₂ pressure buildup during decarboxylation:

  1. Calculate moles of THCa based on weight and concentration
  2. Determine moles of CO₂ produced (1:1 ratio with THCa)
  3. Apply ideal gas law to calculate pressure at given temperature and volume

The decarboxylation reaction: THCa → THC + CO₂

What are the mathematical formulas?

Ideal Gas Law:

$$PV = nRT$$
Where P = pressure, V = volume, n = moles, R = gas constant, T = temperature

Moles of CO₂ produced:

$$n_{CO_2} = \frac{\text{Weight} \times \text{THCa\%}}{100 \times 358.47}$$
Using THCa molecular weight of 358.47 g/mol

Pressure calculation:

$$P = \frac{n_{CO_2} \times R \times T}{V}$$
Pressure in atmospheres, converted to PSI
What pressure levels are safe?

Pressure Safety Guidelines:

  • 0-15 PSI: Safe for most glass vessels and standard equipment
  • 15-30 PSI: Use pressure-rated glassware or steel vessels
  • 30+ PSI: Requires specialized pressure equipment, safety protocols

Important: Always use appropriate pressure relief valves and follow safety protocols. This calculator provides estimates - actual conditions may vary.

Why does vessel volume matter?

Vessel volume directly affects pressure through the ideal gas law. For the same amount of CO₂:

  • Smaller vessels = Higher pressure (inverse relationship)
  • Larger vessels = Lower pressure (more space for gas expansion)

This is why proper vessel selection is critical for safe decarboxylation processes.

How accurate are these calculations?

The calculations are based on established thermodynamic principles, but real-world factors can affect accuracy:

Accurate assumptions:

  • Ideal gas behavior of CO₂ at moderate temperatures
  • Complete decarboxylation reaction
  • Molecular weight constants

Potential variations:

  • Incomplete decarboxylation reactions
  • Temperature gradients in vessels
  • Material solubility effects
  • Vessel compliance (slight expansion)

Use these calculations as guidelines and always implement appropriate safety measures.