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frez [133]
3 years ago
6

The activation energy for the reaction no2(g)+co(g)⟶no(g)+co2(g) is ea = 175 kj/mol and the change in enthalpy for the reaction

is δh = -200 kj/mol . what is the activation energy for the reverse reaction?
Chemistry
1 answer:
Alik [6]3 years ago
4 0
Answer: 375 kJ/mol

Explanation:

1) δh = -200 kj/mol means that the reaction is exothermic and the products of the forward reaction are 200 kJ/mol lower in the potential energy diagram.

2) The reverse reaction must compensate the 200 kJ/mol and go upper as much as the activation energy of the forward reaction.

You can see the attache diagram to verify that

        Ea reverse = Ea forward + | δh |

        Ea reverse = 175 kJ / mol + | -200 kJ/mol | = 175 kJ/mol + 200 kJ/mol = 375 kJ/mol, which is the answer.
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Answer:

Phosphorus-28 undergoes beta-minus decay to produce

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\rm ^{28}_{13} Al \to ^{28}_{14} Si + ^{\phantom{-}0}_{-1}e + \bar{\mathnormal{v}}_{\rm e}

Explanation:

In simple words, when a nucleus undergoes beta-minus decay, a neutron is converted to a proton. An electron and an electron antineutrino will be released.

\rm ^{1}_{0}n^{0} \to ^{1}_{1}p^{+} + ^{\phantom{-}0}_{-1}e^{-} + \bar{\mathnormal{v}}_{\rm e}.

One way to tell whether a neutron is converted to a proton, but not vice versa, is to check the sum charges on the two sides of this equation.

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Since the mass number of a proton and a neutron are both 1, the overall mass number of the atom will stay the same.

The atomic number is the number of protons in each atom. That number determines the symbol and the chemical properties of the atom. When one neutron in an atom is converted to a proton, the atomic number of the atom will increase by 1.

The atomic number of the daughter nucleus, silicon, is 14. It takes a parent nucleus with atomic number 14 - 1 = 13 to produce a silicon atom. Refer to a modern periodic table. Atomic number 13 corresponds to the element aluminum.

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Complete the other details (electron and electron antineutrino) to obtain the equation

\rm ^{28}_{13} Al \to ^{28}_{14} Si + ^{\phantom{-}0}_{-1}e + \bar{\mathnormal{v}}_{\rm e}.

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How many moles of h2o are produced when using 7 moles of h2
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