7. Endothermic reactions absorb a lot of energy. Exothermic reactions give off a lot of energy. Which type of reaction has a higher activation energy? Which one takes more energy to break up the bonds of the reactants?(1 point)
Endothermic reactions have a higher activation energy. Exothermic reactions require more energy to break up the bonds of the reactants.****
Exothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.
Exothermic reactions have a higher activation energy. Exothermic reactions require more energy to break up the bonds of the reactants.
Endothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.
8. Why is thermal energy (heat) required to freeze ice into crystals?(1 point)
Heat must be absorbed by the reactants and the products.
Heat must be released by the products in order to convert from the reactants.
Heat must be absorbed by the products in order to convert from the reactants.
Heat must be released by the reactants and the products. ****
Im not really sure on 8, this is an educated guess)))
I don't agree with either of your answers.
U are unhelpful Bob lmao
The correct answers are:
7. Endothermic reactions have a higher activation energy. Exothermic reactions require more energy to break up the bonds of the reactants.
To determine which type of reaction has a higher activation energy, we need to understand the concept of activation energy. Activation energy is the minimum amount of energy required for a chemical reaction to occur. It acts as a barrier that reactant molecules must overcome in order to form products.
In endothermic reactions, the reactants have lower energy than the products. Therefore, the activation energy for endothermic reactions is higher because it requires more energy to raise the energy of the reactants to the level needed for the reaction to proceed.
On the other hand, in exothermic reactions, the reactants have higher energy than the products. The activation energy for exothermic reactions is lower because the excess energy of the reactants helps to lower the barrier and facilitate the reaction.
Hence, endothermic reactions have a higher activation energy, while exothermic reactions have a lower activation energy.
Regarding breaking up the bonds of the reactants, it requires energy input to break the bonds and convert the reactants into products. In exothermic reactions, since the reactants have higher energy than the products, more energy is required to break the stronger bonds between the reactant molecules. Therefore, exothermic reactions require more energy to break up the bonds of the reactants.
8. Heat must be released by the reactants and the products.
To understand why thermal energy (heat) is required to freeze ice into crystals, we need to consider the concept of heat transfer. When a substance undergoes a phase change, such as freezing or melting, thermal energy is either absorbed or released by the substance.
In the case of freezing ice into crystals, heat must be released by the reactants (water molecules) and the products (ice crystals) in order to convert from the liquid state to the solid state. This is because during freezing, the water molecules lose energy and arrange themselves into a more ordered structure, forming the solid ice crystals.
Therefore, the correct answer is that heat must be released by the reactants and the products in order to freeze ice into crystals.