1. Fill in the blanks Chemical reactions either release energy or absorb e react
ID: 591061 • Letter: 1
Question
1. Fill in the blanks Chemical reactions either release energy or absorb e reaction that releases energy is called an reaction that absorbs energy is called an a) nergy as they proceed A reaction, a reaction. b) The energy that's released or absorbed by a reaction comes from and of chemical bonds that the occurs during a reaction. is the energy required to pull two bonded atoms c) apart (i e. break a bond) This is the same as the energy when that bond is formed. Is this the same or different for different kinds of bonds? Is it the case that the stronger a bond is the greater is this energy or the smaller is this energy? they Is energy released or absorbed when this d) During a chemical reaction are reactant bonds made or are broken? occurs? The stronger the reactant bonds are, the smaller or larger (Choose one) is this energy? During a chemical reaction are product bonds made or are they broken? e) Is energy released or absorbed when this The stronger the product bonds are, the smaller or larger (Choose one.) is this energy? The difference between the energies referred to in parts (d) and (e) of question 1 is the energy released or absorbed by a reaction. Using this idea, explain why a) A reaction in which the product bonds are stronger than the reactant bonds is 2. exothermic. b) A reaction in which the reactant bonds are stronger than the product bonds is endothermic.Explanation / Answer
1)
a) A reaction that releases energy is called an Exothermic reaction. A reaction that absorbs energy is called an Endothermic reaction.
b) The Energy that's released or absorbed bya reaction comes from the Making and Breaking of the chemical bonds that cocurs during the reaction.
c) Bond energy is the energy required to pull two bonded atoms apart(i.e break a bond). This is same as the energy Absorbed when the bond is formed. It is different for different kinds of bonds. Stronger the bond , greater is the energy required to break the bond.
d) During a chemical reaction, reactants bonds are formed. Energy is released when the bonds are formed.
The stronger the reactants bonds larger is this energy absorbed
e) During a chemical reaction, reactants bonds are broken. Energy is absorbed when the bonds break.
The stronger the products bond larger is this energy released.
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