// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
sci.activation-energy-arrhenius Calculator
Calculates the activation energy Ea of a chemical reaction from the Arrhenius equation using rate constants at two temperatures: ln(k₂/k₁) = Ea/R × (1/T₁ − 1/T₂). A 10 °C rise roughly doubles the reaction rate for Ea ≈ 50–60 kJ/mol — most biochemical reactions fall in this range.
Inputs
Rate K1
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Rate K2
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Temp1 C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Temp2 C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Results
activation energy Ea (kJ/mol)
The value at the specified point or condition.
pre-exponential factor A
A dimensionless multiplier applied in the calculation.
Ea = -R·ln(k₂/k₁)/(1/T₂-1/T₁)
Sample size or count used in the calculation.
10°C rule (Q₁₀)
Reference formula or conversion factor shown for context.