Practice Exothermic Reactions (5.1) - Chemical Reactions

Practise this section

9 questions

Flashcard drill
2 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
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is an exothermic reaction?
Show hintHide hint
Think about what happens in a fireplace.
Question 2.
Name an example of an exothermic reaction.
Show hintHide hint
What do we burn to produce heat and light?
3Question 3.
What happens in an exothermic reaction?
- Heat is absorbed
- Heat is released
- Temperature stays the same
Show hintHide hint
Think of combustion reactions.
4Question 4.
Is combustion an example of an exothermic reaction?
- True
- False
Show hintHide hint
Consider what happens when wood burns.
Question 5.
A candle burns releasing heat at a rate of 20 kJ/h. If the candle burns for 3 hours, how much total heat is released?
Show hintHide hint
Use the formula: Power x Time = Total Heat.
Question 6.
If a chemical reaction releases 1500 kJ of energy, how would you classify this reaction?
Show hintHide hint
Consider the definition of energy release.

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