Question

reaction in which energy is absorbed are known as endothermic reaction

state this statement true or false​

Answer 1

Explanation:

Learning Objective

Distinguish between endothermic and exothermic reactions

Key Points

All chemical reactions involve the transfer of energy.

Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy.

Exothermic processes release energy upon completion, and are signified by a negative change in enthalpy.

Terms

exothermicOf a chemical reaction that releases energy in the form of heat.

enthalpyIn thermodynamics, a measure of the heat content of a chemical or physical system.

endothermicOf a chemical reaction that absorbs heat energy from its surroundings.

All chemical processes are accompanied by energy changes. When a reaction proceeds, it either releases energy to, or absorbs energy from, its surroundings. In thermodynamics, these two types of reactions are classified as exothermic or endothermic, respectively. An easy way to remember the difference between these two reaction types is by their prefixes: endo- means to draw in, and exo- means to give off. We will explore these concepts in more detail after introducing the concept of enthalpy.

Enthalpy

Enthalpy (signified as H) is a measure of the total energy of a system and often expresses and simplifies energy transfer between systems. Since the total enthalpy of a system cannot be measured directly, we most often refer to the change in enthalpy for a particular chemical reaction. At constant pressure, the change in enthalpy is equal to the heat given off, or the heat absorbed, in a given chemical reaction:

[latex]\Delta H=q_{rxn}[/latex]

Due to this relation, the change in enthalpy, [latex]\Delta H[/latex], is often referred to as the “heat of reaction.”

Answer 2

ANSWER:

TRUE


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