3 years ago

Define and explain bond energy.

Chemistry

2 answers:

Tomtit [17]3 years ago

6 0

Bond Energy - measure of the amount of energy needed to break apart one molecule of covalently bonded gases.

julia-pushkina [17]3 years ago

4 0

Bond energy is known as the amount of energy needed to break a molecule into its atoms. .

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Given the chemical reaction Fe3O4 + H2 ⟶ Fe + H2O, identify the coefficient of H2O in the balanced equation.

Nesterboy [21]

Answer:

fe3o4+4h2 - 3fe + 4h2o

therefore coefficient is 4

6 0

2 years ago

Using the reaction below: 2 CO2(g) + 2 H2O(l) → C2H4(g) + 3 O2(g) ΔHrxn= +1411.1 kJ What would be the heat of reaction for this

maw [93]

Answer: d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

$2CO_2(g)+2H_2O(l)\rightarrow C_2H_4(g)+3O_2(g)$ $\Delta H=+1411.1kJ$

Reversing the reaction, changes the sign of $\Delta H$

$C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(l)$

$\Delta H=-1411.1kJ$

On multiplying the reaction by $\frac{1}{2}$ , enthalpy gets half:

$0.5C_2H_4(g)+1.5O_2(g)\rightarrow CO_2(g)+H_2O(l)$ $\Delta H=\frac{1}{2}\times -1411.1kJ=-705.55kJ/mol$

Thus the enthalpy change for the given reaction is -705.55kJ

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2 years ago

Which one of the following is not a property of a base?

AlekseyPX

Answer:

option B is correct

Explanation:

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2 years ago

Which element is a halogen? argon bromine calcium lithium

almond37 [142]

It is (CI) bromine
because, Halogen element, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

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Molecules are packed tigghtly together

Tju [1.3M]

Yes molecules are tightly together. Hope this helps

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3 years ago