Cherylanne mixes together chemical a and chemical b in a test tube, forming chemical c. the mixture instantly turns cool to the touch. she then adds chemical d, and the reaction becomes hot and explodes. what can be known about this situation? chemicals a and b form an endothermic reaction, and chemicals c and d form an exothermic reaction. chemicals a and b form an exothermic reaction, and chemicals c and d form an endothermic reaction. chemicals a and c form an endothermic reaction, and chemicals b and d form an exothermic reaction. chemicals a and b form an exothermic reaction, and chemicals b and d form an endothermic reaction.

Answer : Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction.

Explanation :

Endothermic reaction : When the system absorb heat from the surrounding then the surrounding become cool.

Exothermic reaction : when the system releases heat into the surrounding then the surrounding become hot.

According to the question,

when we mixed chemical A and chemical B together in a test tube to form chemical C, the mixture become cool. This means that the system is absorbing heat from the surrounding and thus the reaction is called a endothermic reaction.

And when we added chemical D in chemical C, the new mixture becomes hot and explodes. This means that the system is releasing heat into the surrounding and thus the reaction is called as exothermic reaction.

10 years is the answer

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.