What does negative Gibbs energy mean?

ΔG 0 requires energy input to proceed.

How does temperature affect reaction spontaneity?

From ΔG = ΔH - TΔS: reactions with ΔH>0, ΔS>0 become spontaneous at high T. Reactions with ΔH<0, ΔS<0 become non-spontaneous at high T. This determines temperature windows for reactions.

What is the relationship between Gibbs energy and equilibrium constant?

ΔG° = -RT·ln(K). At 25°C: ΔG° = -5.71·log(K) kJ/mol. If K=10⁶: ΔG° = -34.3 kJ/mol (strongly spontaneous). If K=10⁻⁶: ΔG° = +34.3 kJ/mol (strongly non-spontaneous).

Gibbs Free Energy Calculator

Calculate ΔG = ΔH - TΔS. Reaction spontaneity: ΔG < 0 spontaneous, ΔG = 0 equilibrium, ΔG > 0 non-spontaneous. Equilibrium constant K = exp(-ΔG°/RT). Standard Gibbs energy of formation.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate ΔG = ΔH - TΔS. Reaction spontaneity: ΔG < 0 spontaneous, ΔG = 0 equilibrium, ΔG > 0 non-spontaneous. Equilibrium constant K = exp(-ΔG°/RT). Standard Gibbs energy of formation. Use the gibbs free energy result to inform your clinical assessment.

Related Calculators

Enthalpy Change

Engineering

Entropy Change

Engineering

Helmholtz Free Energy

Engineering

Gibbs Free Energy Calculator

How to Use

Related Calculators

Frequently Asked Questions

What does negative Gibbs energy mean?

How does temperature affect reaction spontaneity?

What is the relationship between Gibbs energy and equilibrium constant?