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
