Question

1. in which type of reaction does the system gain energy from the surroundings?

a. both exothermic and endothermic
b. endothermic
c. neither exothermic nor endothermic
d. exothermic

Explanation:

• An endothermic reaction is defined as a reaction where the system absorbs (gains) energy from the surroundings.
• In an exothermic reaction, the system releases energy to the surroundings.
• Since the question asks for the reaction where the system gains energy from the surroundings, we can eliminate options that involve exothermic reactions (a and d). Option c is incorrect as all chemical reactions are either exothermic or endothermic.

Answer:

B. Endothermic