(a)
Interpretation:
Mass difference of the given reaction has to be calculated
Concept Introduction:
Nuclear reaction: A nuclear reaction in which a lighter nucleus fuses together into new stable nuclei or a heavier nucleus split into stable daughter nuclei with the release of large amount of energy.
Change in mass of a given reaction can be determined as given,
Δm = Mass of reactant− Mass of products
(a)

Explanation of Solution
Given information is shown below,
Given reaction: 24396Cm→ 23994Pu+ 42HeMass of 24396Cm= 243.0614 amuMass of 23994Pu= 239.0522 amuMass of 42He= 4.0026 amu
- Calculate the mass of products:
Mass of products is determined as shown below,
Mass of products = Mass of 42He + Mass of 23994Pu= (4.0026 amu)+(239.0522 amu)= 243.0548 amu
- Calculate the mass difference:
Mass of reactants (24396Cm) is 243.0614 amu
Mass difference of the reaction can be calculated as given,
Δm = Mass of reactant− Mass of products= (243.0614 amu)−(243.0548 amu)= 0.0066 amu
Mass difference is 0.0066 amu.
- Convert unit of mass difference to Kg:
Mass difference for the reaction is converted from amu to kg as follows,
Δm = (0.0066 amu)(1.661×10−24 g1 amu)(1 kg10−3 kg)= 1.1×10−29 kg
Mass difference for the reaction is 1.1×10−29 kg.
(b)
Interpretation:
Energy released (in J)during the given reaction has to be determined.
Concept Introduction:
Nuclear reaction: A nuclear reaction in which a lighter nucleus fuses together into new stable nuclei or a heavier nucleus split into stable daughter nuclei with the release of large amount of energy.
Nuclear binding energy: It is the energy that requires for the breaking one mole of nuclei of an element to its individual nucleons.
Nucleus + nuclear binding energy → nucleons
It can be calculated using the given formula,
ΔE = Δmc2where,Δm = Mass Differencec= Speed of light
(b)

Explanation of Solution
Given information is shown below,
Given reaction: 24396Cm→ 23994Pu+ 42HeMass of 24396Cm= 243.0614 amuMass of 23994Pu= 239.0522 amuMass of 42He= 4.0026 amu
- Calculate the mass difference:
Mass of reactants (24396Cm) is 243.0614 amu
Mass difference of the reaction can be calculated as given,
Δm = Mass of reactant− Mass of products= (243.0614 amu)−(243.0548 amu)= (0.0066 amu)(1.661×10−24 g1 amu)(1 kg10−3 kg)= 1.1×10−29 kg
Mass difference for the reaction is 1.1×10−29 kg.
- Calculate the energy released:
Energy released is calculated as follows for the reaction,
Energy released, E = mc2= (1.1×10−29 kg)(2.998×108 m/s)2= 9.8527×10−13 J
Energy released during the given reaction is 9.8527×10-13J.
(c)
Interpretation:
Energy released (in kJ/mol)during the given reaction has to be determined and difference between this energy values of heat of energy in a
Concept Introduction:
Nuclear reaction: A nuclear reaction in which a lighter nucleus fuses together into new stable nuclei or a heavier nucleus split into stable daughter nuclei with the release of large amount of energy.
Nuclear binding energy: It is the energy that requires for the breaking one mole of nuclei of an element to its individual nucleons.
Nucleus + nuclear binding energy → nucleons
It can be calculated using the given formula,
ΔE = Δmc2where,Δm = Mass Differencec= Speed of light
(c)

Explanation of Solution
Given information is shown below,
Given reaction: 24396Cm→ 23994Pu+ 42HeMass of 24396Cm= 243.0614 amuMass of 23994Pu= 239.0522 amuMass of 42He= 4.0026 amu
- Calculate the mass difference:
Mass of reactants (24396Cm) is 243.0614 amu
Mass difference of the reaction can be calculated as given,
Δm = Mass of reactant− Mass of products= (243.0614 amu)−(243.0548 amu)= (0.0066 amu)(1.661×10−24 g1 amu)(1 kg10−3 kg)= 1.1×10−29 kg
Mass difference for the reaction is 1.1×10−29 kg.
- Calculate the energy released:
Energy released for the reaction is calculated as follows,
Energy released, E = mc2= (1.1×10−29 kg)(2.998×108 m/s)2= 9.8527×10−13 J
Energy released during the given reaction is 9.8527×10−13 J.
- Convert the unit of energy released to kJ/mol :
Unit of energy released is converted as follows,
Binding energy, E in kJ/mol = (9.8527×10−13 Jreactions)(6.022×1023 reactions1Emol)(1 kJ103 J)= 5.9×108 kJ/mol
Energy released during the given reaction is 5.9×108kJ/mol.
Energy released during the given reaction is 5.9×108 kJ/mol whereas the energy values of heat of energy in a chemical reaction are in few hundreds kJ/mol.
This value is about one million times more than a typical heat of energy in a chemical reaction.
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Chapter 24 Solutions
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