Question

chemical reactions
a absorb more energy than they release
b can either release more energy than they absorb or absorb more energy than they release, depending on the reaction
c release and absorb exactly the same amount of energy
d release more energy than they absorb
question 5 (1 point)
a solid, yellow substance formed when mr simon poured two colorless liquids together at room temperature. which statement best explains why this demonstrates a chemical reaction?
a the color of the liquids changed to yellow.
b one of the liquids dissolved in the other liquid.
c one of the liquids changed from a liquid to a solid.
d the yellow substance is a solid at room temperature.

Explanation:

For the first question, exothermic reactions release more energy than they absorb, and endothermic reactions absorb more energy than they release. So chemical reactions can either release or absorb more energy depending on the type. For the second question, a chemical reaction is characterized by the formation of a new substance with different properties. Here, a solid yellow - substance (a new substance) formed from two colorless liquids, indicating a chemical change.

Answer:

1. B. can either release more energy than they absorb or absorb more energy than they release, depending on the reaction
2. D. The yellow substance is a solid at room temperature