Hydrothermal Vent pH Gradient Proton Motive Force Estimate Calculator
Proton electrochemical potential inside-minus-outside Δψ−2.303RT/FΔpH, sign explicit. Independently measured compatible gradient/temperature; not available ATP, growth, membrane feasibility or universal vent energy.
Description
Proton electrochemical potential combines electrical potential with a pH-dependent chemical contribution.
Proton electrochemical potential combines electrical potential with a pH-dependent chemical contribution.1
The inside-minus-outside sign convention and absolute temperature define this calculation. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Hydrothermal Vent pH Gradient Proton Motive Force Estimate Calculator
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the observation or experimental context, reference/calibration source, unit basis and adopted model assumptions.
How to use Hydrothermal Vent pH Gradient Proton Motive Force Estimate Calculator and understand its results
- Establish the observation or experimental context, reference/calibration source, unit basis and adopted model assumptions.
- Enter temperatureKelvin, outsidePh, insidePh, independentlyMeasuredInsideMinusOutsidePotentialVolts, using the field meanings and rules below, then run the tool.
- Read result.conditionalInsideMinusOutsideProtonElectrochemicalPotentialVolts. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| temperatureKelvin | Temperature kelvin | number | Required |
| outsidePh | Outside ph | number | Required |
| insidePh | Inside ph | number | Required |
| independentlyMeasuredInsideMinusOutsidePotentialVolts | Independently measured inside minus outside potential volts | number | Required |
Require positive temperature in kelvin, both pH values in inclusive 0–14 and finite inside-minus-outside electric potential in volts. Subtract 0.00008617333262145×T×ln10×(insidePH−outsidePH). Return the signed electrochemical potential in volts; no membrane potential measurement or full vent energetics model is inferred.
insideMinusOutsideProtonPotentialV=electricalPotentialV−0.00008617333262145×temperatureK×ln10×(insidePH−outsidePH) Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.conditionalInsideMinusOutsideProtonElectrochemicalPotentialVolts | Conditional Inside Minus Outside Proton Electrochemical Potential Volts; use the units, sign convention and calculation stated above | number |
{
"input": {
"temperatureKelvin": 300,
"outsidePh": 6,
"insidePh": 7,
"independentlyMeasuredInsideMinusOutsidePotentialVolts": 0
},
"output": {
"result": {
"conditionalInsideMinusOutsideProtonElectrochemicalPotentialVolts": -0.05952642933233049
}
}
}Limitations and assumptions
The inside-minus-outside sign convention and absolute temperature define this calculation. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Methanogenesis Energy Yield kJ per mole Reaction Calculator to examine a related aspect: Reaction Gibbs energy combines a matched standard-state value with a temperature-dependent reaction quotient.
Use Chemolithotrophy Minimum Maintenance Energy Threshold Calculator where its separate inputs and scope apply: Maintenance capacity compares usable power with a per-cell energy requirement.
References
Similar or alternative tools
- Methanogenesis Energy Yield kJ per mole Reaction Calculator
Reaction Gibbs energy combines a matched standard-state value with a temperature-dependent reaction quotient.
- Chemolithotrophy Minimum Maintenance Energy Threshold Calculator
Maintenance capacity compares usable power with a per-cell energy requirement.