General reaction laboratory
Choose reviewed reactants and conditions, observe products, balance atoms, calculate stoichiometry and inspect the energy change.
Scientific learning path
- 01UnderstandLive
- 02ExploreLive
- 03ExperimentLive
- 04ObserveLive
- 05ExplainLive
- 06ApplyLive
- 07TestLive
Interactive experiment
LiveC2H4(g) + H2(g) → C2H6(g)
Reactants ready — start the reaction
Observation
Start the model to reveal the expected macroscopic observation.
Theory
The pi bond is replaced by two C-H sigma bonds; the net reaction is an addition and reduction.
Balance
LiveEdit coefficients only. Subscripts identify the substances and must not change.
Calculation
- Reaction extent
- 1.000 mol
- Standard ΔH
- -137.0 kJ
- C2H6 produced
- 1.000 mol
ΔH° = -137 kJ per 1 mol C2H4 consumed; scaled by reaction extent.
Energy change
Procedure
- Select the first and second reactants.
- Set the amount of the first reactant.
- Select the reviewed reaction condition.
- Start and record the observation.
- Balance with coefficients, then compare atom totals.
- Use reaction extent to calculate product amounts and energy.
Result
Complete the interactive experiment to state a result.
Viva
- Why can coefficients change while subscripts cannot?
- Which reactant would limit the reaction if the second reactant were not supplied in its required ratio?
- What does a negative standard enthalpy change mean?
Quick test
What must remain equal on both sides of an ordinary chemical equation?
Scientific references
Live- Atkins, de Paula & Keeler, Atkins’ Physical Chemistry, 11th ed.
- NIST Chemistry WebBook — thermochemical reference data.
Description of this simulation
Choose two reactants, the amount and a suitable condition, then start the reviewed hydrogenation of ethene model.
Quick test · 3 questions
Reaction learning path
7 of 17 reviewed reactions
Open foundation-to-advanced pathObjective
Safety
LiveHydrogen is highly flammable. Catalytic hydrogenation requires trained supervision and controlled equipment.
This screen is a simulation, never a substitute for supervised laboratory risk assessment.
Chemicals
C2H4(g) + H2(g)
Apparatus
- Catalyst chamber model
- Gas inlet controls
- Heating control
- Gas detector
What this model shows — and what it simplifies
Educational ModelThis is a closed, stoichiometric teaching model.
Where do we see this in real life?
Catalytic hydrogenation is used to tune the saturation and physical properties of chemical feedstocks.
Explain this result
Scientific review record
Building- Module version
- v1 bundled
- Published
- Loading…
- Last reviewed
- Not yet verified
- Academic level
- School
- Reviewer
- Not publicly assigned
Loading source metadata…