Experiments
Here are experiments our science specialists have selected to support the IB* topic.
Additivity of Heats of Reaction: Hess's Law
Experiment #18 from Chemistry with Vernier
In this experiment, you will
- Combine equations for two reactions to obtain the equation for a third reaction.
- Use a calorimeter to measure the temperature change in each of three reactions.
- Calculate the heat of reaction, ΔH, for the three reactions.
- Use the results to confirm Hess’s law.
Determining the Enthalpy of a Chemical Reaction
Experiment #13 from Advanced Chemistry with Vernier
In this experiment, you will
- Use Hess’s law to determine the enthalpy change of the reaction between aqueous ammonia and aqueous hydrochloric acid.
- Compare your calculated enthalpy change with the experimental results.
The Enthalpy of Neutralization of Phosphoric Acid
Experiment #26 from Advanced Chemistry with Vernier
In this experiment, you will
- Measure the temperature change of the reaction between solutions of sodium hydroxide and phosphoric acid.
- Calculate the enthalpy, ΔH, of neutralization of phosphoric acid.
- Compare your calculated enthalpy of neutralization with the accepted value.
Heat of Combustion: Magnesium
Experiment #19 from Chemistry with Vernier
In this experiment, you will
- Combine three chemical equations to obtain a fourth.
- Use prior knowledge about the additivity of reaction heats.
- Determine the heat of combustion of magnesium ribbon.
- Educational Standard
- International Baccalaureate (IB)
- Subject
- Chemistry
- Section
- Core
- Topic
- 5. Energetics/Thermochemistry
* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.