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Alik [6]
4 years ago
13

Which type of reaction releases the greatest amount of energy per mole of reactant?(1) combustion (2) decomposition (3) nuclear

fusion (4) oxidation-reduction
Chemistry
2 answers:
Marina CMI [18]4 years ago
5 0
 (3) nuclear fusion. Nuclear fusion reactions release a lot of energy
NISA [10]4 years ago
5 0
Nuclear fusion.

Nuclear fusion reactions release a lot of energy

Explanation:

In natural philosophy<span>, </span>the nuclear reaction could be a<span> reaction </span>during which 2<span> or </span>additional<span> atomic nuclei </span>identical<span> enough </span>to create one<span> or </span>additional completely different<span> atomic nuclei and subatomic particles (neutrons or protons). The </span>distinction<span> in mass between the reactants and </span>product<span> is manifested </span>because the unharness of enormous<span> amounts of energy.</span>
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Calculate the standard reaction enthalpy for the reaction NO2(g) → NO(g) + O(g) given +142.7 kJ/mol for the standard enthalpy of
bulgar [2K]

Answer:

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

Explanation:

O_2(g) \rightarrow \frac{2}{3}O_3(g),\Delta H^o_{1}=142.7 kJ/mol..[1]

O_2(g) \rightarrow 2 O(g),\Delta H^o_{2}=498.4 kJ/mol..[2]

NO(g) + O_3(g)\rightarrow NO_2(g) + O_2(g) ,\Delta H^o_{3} = -200 kJ/mol..[3]

NO_2(g)\rightarrow NO(g) + O(g),\Delta H^o_{4}=?..[4]

Using Hess's law:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

2 × [4] = [2]- (3 ) × [1] - (2) × [3]

2\times \Delta H^o_{4}=\Delta H^o_{2} -3\times \Delta H^o_{1}-2\times \Delta H^o_{3}

2\times \Delta H^o_{4}=498.4 kJ/mol-3\times 142.7 kJ/mol-2\times -200 kJ/mol

2\times \Delta H^o_{4}=470.3 kJ/mol

\Delta H^o_{4}=\frac{470.3 kJ/mol}{2}=235.15 kJ/mol

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

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3 years ago
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