Energy and Biochemical Reactions Flashcards
In a chemical reaction, _______ are changed into _______.
reactants, products
While a cake is baking in an oven, heat is absorbed. This is an example of an ______ reaction.
endothermic
The ability to do work is called _____.
energy
Which of the following statements is NOT true about energy and chemical reactions?
Some chemical reactions neither release nor absorb energy.
_____energy is the energy needed to start a chemical reaction.
activation
What is the general chemical equation for an exothermic reaction?
Reactants → Products + Heat
What makes a chemical reaction endothermic?
Heat absorption
A reaction that absorbs heat from its surroundings is an exothermic reaction.
false
The burning of a substance is an example of an endothermic reaction.
false
Exothermic reactions are any chemical reaction that _________ energy.
releases
Energy passes through an ecosystem in one direction only.
true
Activation energy does not provide the “push” needed to start a chemical reaction.
false
A chemical reaction that releases energy (as heat) is called an ________ reaction.
exothermic
An exothermic reaction is the opposite of an endothermic reaction.
true
Energy is required to allow molecules to overcome forces and come together to react.
true
Activation energy is needed to start a chemical reaction.
true
