The reason for relation between the activation energy and enthalpy change for endothermic reaction and no such relation for exothermic reaction needs to be explained. Concept introduction: A chemical reaction is said to be endothermic, if energy is given to the system. In such cases, heat is in the reactant side. The value of change in enthalpy is positive as it is added to the system. The energy of reactant is less than that of product in this case. On the other hand, for exothermic reaction heat is released and it is present in product side. The energy of product is less than that of reactant in this case. The value of change in enthalpy is negative for exothermic reactions. The activation energy is defined as the minimum amount of energy needed to start a reaction.
The reason for relation between the activation energy and enthalpy change for endothermic reaction and no such relation for exothermic reaction needs to be explained. Concept introduction: A chemical reaction is said to be endothermic, if energy is given to the system. In such cases, heat is in the reactant side. The value of change in enthalpy is positive as it is added to the system. The energy of reactant is less than that of product in this case. On the other hand, for exothermic reaction heat is released and it is present in product side. The energy of product is less than that of reactant in this case. The value of change in enthalpy is negative for exothermic reactions. The activation energy is defined as the minimum amount of energy needed to start a reaction.
Definition Definition Transformation of a chemical species into another chemical species. A chemical reaction consists of breaking existing bonds and forming new ones by changing the position of electrons. These reactions are best explained using a chemical equation.
Chapter 20, Problem 48E
Interpretation Introduction
Interpretation:
The reason for relation between the activation energy and enthalpy change for endothermic reaction and no such relation for exothermic reaction needs to be explained.
Concept introduction:
A chemical reaction is said to be endothermic, if energy is given to the system. In such cases, heat is in the reactant side. The value of change in enthalpy is positive as it is added to the system. The energy of reactant is less than that of product in this case. On the other hand, for exothermic reaction heat is released and it is present in product side. The energy of product is less than that of reactant in this case. The value of change in enthalpy is negative for exothermic reactions.
The activation energy is defined as the minimum amount of energy needed to start a reaction.
Highlight each glycosidic bond in the molecule below. Then answer the questions in the table under the drawing area.
HO-
HO-
-0
OH
OH
HO
NG
HO-
HO-
OH
OH
OH
OH
NG
OH
€
+
Suppose the molecule in the drawing area below were reacted with H₂ over a platinum catalyst. Edit the molecule to show what would happen to it. That is, turn
it into the product of the reaction.
Also, write the name of the product molecule under the drawing area.
Name: ☐
H
C=0
X
H-
OH
HO-
H
HO-
-H
CH₂OH
×
Draw the Haworth projection of the disaccharide made by joining D-glucose and D-mannose with a ẞ(1-4) glycosidic bond. If the disaccharide has more than
one anomer, you can draw any of them.
Click and drag to start drawing a
structure.
X