Chemistry
First-Order Half-Life
Half-life of a first-order reaction.
Formula
Formula
t½ = ln 2k
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| k | rate constant (1/s) | real number (ℝ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenrate constant k = 0.005
Result138.6294361
Example 2
Givenrate constant k = 0.1
Result6.931471806