Question

Which one of the following statements best describes the e
nthalpy change of a reaction?
a) The energy released when chemical bonds are formed during a chemical reaction
b) The energy consumed when chemical bonds are broken during a chemical reaction.
c) The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction
d) The increase in disorder of the system as a reaction proceeds​

Answer 1

Answer:

I think B

Explanation:

IONIZATION ENTHALPY AMOUNT OF ENERGY REQUIRED FOR BOND FORMATION

Answer 2

• The central factor in thermodynamics is ENTHALPY.
• The heat content of the system is usually described as enthalpy.
• Heat gain or loss, in or out of energy during a reaction, is the enthalpy change.
• The reaction can release heat energy; such reactions are exothermic reactions.
• The reaction which requires heat energy reactions is endothermic.

Hence, the correct explanation of the enthalpy change is given by the option (a) The energy released when chemical bonds are formed during a chemical reaction