Practice Enthalpy Changes In Chemical Reactions (1) - Unit 5: Energetics and Thermochemistry

Practise this section

8 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the definition of enthalpy?
Show hintHide hint
It relates to energy and volume.
Question 2.
What happens to the temperature of the surroundings in an exothermic reaction?
Show hintHide hint
Think about heat flow direction.
3Question 3.
What is enthalpy primarily concerned with?
- Temperature changes
- Heat exchange
- Pressure variations
Show hintHide hint
Relate it to energy transfer.
4Question 4.
True or False: An endothermic reaction has a negative ΔH.
- True
- False
Show hintHide hint
Think about heat flow direction.
Question 5.
Using the enthalpy values provided, calculate the standard enthalpy of reaction for the formation of CO₂ (g) from carbon and oxygen.
Show hintHide hint
Use ΔH_f° values for carbon and oxygen as zero.
Question 6.
Explain why the enthalpy change for the combustion of fuels is critical in energy production, including examples.
Show hintHide hint
Consider how exothermic reactions benefit energy needs.

4 more questions in this section. Enroll free to practise them all.