Enthalpy changes and enthalpy level diagrams Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. A reaction has ΔH = +35 kJ mol⁻¹. Which statement is correct?
- A. The surroundings get hotter
- B. Products are at a lower enthalpy than reactants
- C. The reaction is endothermic and the surroundings cool
- D. The reaction releases heat
2. Which is the equation for the standard enthalpy change of formation of carbon dioxide?
- A. C(graphite) + O₂(g) → CO₂(g)
- B. CO(g) + ½O₂(g) → CO₂(g)
- C. C(g) + 2O(g) → CO₂(g)
- D. C(graphite) + O₂(g) → CO₂(l)
3. What is the standard pressure used for standard enthalpy changes?
- A. 1 atm
- B. 101 kPa
- C. 1000 kPa
- D. 100 kPa
4. Which equation represents the standard enthalpy change of atomisation of sodium?
- A. Na(s) → Na⁺(g) + e⁻
- B. Na(s) → Na(g)
- C. Na(g) → Na⁺(g) + e⁻
- D. 2Na(s) → 2Na(g)
5. Burning 0.50 mol of a fuel with ΔcH = –600 kJ mol⁻¹ releases how much energy?
- A. 1200 kJ
- B. 600 kJ
- C. 300 kJ
- D. 150 kJ