Question

Which of the following statements is correct?

• A. Heat is absorbed in exothermic reaction
• B. Heat is released in endothermic reaction
• C. Energy released in burning 1 litre of gasoline is 300 MJ
• D. Chemical energy is associated with the forces that give rise to the stability of substances

Answer 1

Answer: (D)

Chemical energy is associated with the forces that give rise to the stability of substances

Answer 2

In exothermic reaction heat is released.

In endothermic reaction heat is absorbed.

Energy released in burning 1 litre of gasoline is

30 MJ $( = 3 \times 10^{7}J)$