Question

Which statement is true for most chemical reactions?

O An energy change occurs during the breaking and forming of bonds.
O The internal energy of the system increases during a reaction.
O Energy is released during the formation of reactants.
O The enthalpy of the products is higher than the enthalpy of the reactants

Answer 1

An energy change occurs during the breaking and forming of bonds.

Step-by-step explanation:

Energy changes occur when bonds are broken or formed.

When a bond is formed, energy is released.

When a bond is broken, energy is stored.

Edge 2022

Thermochemical Reactions Quiz answer

Answer 2

An energy change occurs during the breaking and forming of bonds.

Step-by-step explanation: