SUMMARY
The discussion centers on the heat of reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl). When 5.5g of NaOH is added to 200ml of 1.0 mol/l HCl, the heat evolved is calculated based on the enthalpy of the reaction. If 11.0g of NaOH is used instead, the reaction will produce more heat due to the increased amount of reactant, as the enthalpy is directly related to the quantity of starting materials. The molar weight of NaOH is 40g/mol, indicating that 5.5g corresponds to approximately 0.14 mol, while 0.2 mol of HCl is present.
PREREQUISITES
- Understanding of chemical reactions and stoichiometry
- Familiarity with enthalpy and heat of formation concepts
- Knowledge of molar mass calculations, specifically for NaOH and HCl
- Basic principles of thermodynamics related to exothermic reactions
NEXT STEPS
- Research the heat of formation data for NaOH and HCl
- Study the concept of enthalpy changes in chemical reactions
- Learn about exothermic vs. endothermic reactions
- Explore the calculation of heat evolved in neutralization reactions
USEFUL FOR
Chemistry students, laboratory technicians, and educators seeking to understand the thermodynamics of acid-base reactions and the effects of varying reactant quantities on heat evolution.