Expert Chemistry Tutoring

Q1. Knowledge Recall (2 marks)

Define an endothermic reaction and give an example.

Q2. Application (3 marks)

Explain how the temperature of a solution changes in an exothermic reaction.

Q3. Calculations (4 marks)

Calculate the enthalpy change for the following reaction:

Q4. Knowledge Recall (1 mark)

State the energy level diagram for an endothermic reaction.

Q5. Chemical Equation (3 marks)

Write a balanced chemical equation for the combustion of methane.

Q6. Application (2 marks)

Explain how an exothermic reaction can be used in a chemical hand warmer.

Q7. Knowledge Recall (1 mark)

Name the type of reaction where the total energy of the reactants is less than the total energy of the products.

Q8. Calculations (4 marks)

The heat of formation of water is -286 kJ/mol. Calculate the enthalpy change for the reaction:

Q9. Application (3 marks)

Describe the process of photosynthesis in terms of an endothermic reaction.

Q10. Knowledge Recall (2 marks)

Define the term "enthalpy change".