Question

The activation energy for a(n) _____ is quite large and usually takes extra energy from the environment, it is normally not a natural spontaneous process. combustion reaction endothermic reaction exothermic reaction catalyzed reaction

Answer 1

Answer:

endothermic reaction

Explanation:

The activation energy of an endothermic reaction is high. Endothermic reactions need heat to start and do not begin spontaneously. Activation energy is the minimum energy required to convert reactants to products.  The lower the activation energy the easier it is too start a reaction and vice versa. Catalyst helps to lower the activation energy and thereby speed up a chemical reaction.

Answer 2

Answer:

The activation energy for an endothermic reaction is quite large and usually takes extra energy from the environment, it is normally not a natural spontaneous process.

Explanation:

• Endothermic reactions require absorbing energy of the surrounding mainly in the form of heat.

• Chemical energy needs energy input to break the bonds.

• Examples of endothermic reactions: Photosynthesis , melting of ice , and evaporating liquid water.