Concept explainers
(a)
Interpretation:
Given reaction is exothermic or endothermic has to be identified.
(a)

Explanation of Solution
Given reaction is,
From the given equation, it is understood that heat energy is absorbed. Therefore, this is an endothermic reaction. Heat is absorbed form the surroundings.
(b)
Interpretation:
Sign of enthalpy of the given reaction has to be identified.
(b)

Explanation of Solution
Given reaction is,
The reaction given is found to be an endothermic reaction. This means the enthalpy of reactants will be more than that of product. Therefore, enthalpy of the reaction will be positive.
(c)
Interpretation:
Meaning and significance of enthalpy has to be given.
(c)

Explanation of Solution
Given reaction is,
The reaction given is found to be an endothermic reaction. This means the enthalpy of reactants will be more than that of product. Therefore, enthalpy of the reaction will be positive. Enthalpy is the term that is used to represent heat. The sign of enthalpy gives information that the reaction is exothermic or endothermic.
(d)
Interpretation:
Sign of entropy of the given reaction has to be identified.
(d)

Explanation of Solution
Given reaction is,
Entropy is the measure of randomness or disorder in a system. Physical state of the reactant is solid while the product contains gas. Therefore, the randomness or disorder is increased. Value of entropy will be positive.
(e)
Interpretation:
Meaning and significance of entropy has to be given.
(e)

Explanation of Solution
Given reaction is,
Entropy is the measure of randomness or disorder in a system. Physical state of the reactant is solid while the product contains gas. Therefore, the randomness or disorder is increased. Value of entropy will be positive. Endothermic reaction produce products that have lower entropy.
(f)
Interpretation:
The reaction given will be spontaneous or nonspontaneous has to be identified.
(f)

Explanation of Solution
Given reaction is,
It is known that change in enthalpy and entropy for the reaction will be positive. From the observation as the given reaction is endothermic, a little amount of energy is required as an input to initiate the reaction. Therefore, the given reaction is nonspontaneous.
(g)
Interpretation:
Reaction will be slow or fast if the rate constant of the reaction is small has to be predicted.
(g)

Explanation of Solution
Given reaction is,
Larger rate constant value means the reaction will be relatively fast. This is because the concentration of the reactant will be more and there will be increased collision. As the rate constant given for the reaction is small, the reaction will be slow one.
(h)
Interpretation:
One strategy for increasing the
(h)

Explanation of Solution
Given reaction is,
Given reaction is an endothermic reaction. One strategy to increase the rate of the reaction is to increase the temperature. This is because; endothermic reaction absorbs heat from the surroundings.
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Chapter 7 Solutions
GENERAL,ORGANIC+BIOCHEM (LOOSELEAF)
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