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Lesechka [4]
3 years ago
15

In a thermochemical equation, the ___ change is always written next to the balanced chemical equation

Chemistry
1 answer:
Ira Lisetskai [31]3 years ago
8 0
In a thermochemical equation, the enthalpy change is always written next to the balanced chemical equation.

For example, chemical reaction: 2Mg + O₂ → 2MgO. ΔH = -1204 kJ; this is exothermic reaction,
or chemical reaction: Fe₂O₃(s) + 3CO(g) → 2Fe(s) + 3CO₂<span>(g);ΔH = + 26.3 kJ, ths is endothermic reaction.</span>
<span>There are two types of reaction: endothermic reaction (chemical reaction that absorbs more energy than it releases) and exothermic reaction (chemical reaction that releases more energy than it absorbs). </span>
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In like manner, represent particle diagrams that account for the fact that one volume of hydrogen combines with one volume of ch
ArbitrLikvidat [17]

Answer:

According to Avogadro's law which states that equal volumes of all gases under the same condition of temperature and pressure contain equal number of molecules. Therefore, one molecule of hydrogen reacts with one molecule of chlorine to yield two molecules of hydrogen chloride.

The formula of hydrogen chloride is HCl

The particle diagram is found in the attachment below.

Explanation:

The reaction between hydrogen and chlorine to form hydrogen chloride is represented by the equation below

H₂(g) + Cl₂(g) ---> 2HCl(g)

In the reaction equation above, one mole (or one volume) of diatomic hydrogen gas reacts with one mole (or one volume) of diatomic chlorine gas to form two moles (or two volumes) of hydrogen chloride gas. This is in accordance with Avogadro's law which states that equal volumes of all gases under the same condition of temperature and pressure contain equal number of molecules.

3 0
3 years ago
Coefficient of balanced equation: __Fe + ___020) — _Fe_036)
lesya [120]

Answer:

- Four for iron, three for oxygen and 2 for iron (III) oxide:

4Fe+3O_2\rightarrow 2Fe_2O_3

Explanation:

Hello,

In this case, the oxidation of iron is a widely acknowledged reaction occurring in ships and other machines exposed to the air or highly oxidizing medias. Thus, by the effect of oxygen, iron undergoes oxidation typically to iron (III) oxide:

Fe+O_2\rightarrow Fe_2O_3

Nonetheless, the law of conservation of mass must be respected, therefore the coefficients balancing the reaction are four for iron, three for oxygen and 2 for iron (III) oxide:

4Fe+3O_2\rightarrow 2Fe_2O_3

Best regards.

3 0
4 years ago
Calculate the volume in milliliters of a 0.420mol / L barlum chlorate solution that contains 25.0 g of barium chlorate (Ba(ClO 3
Pachacha [2.7K]

<u>Answer:</u> The volume of barium chlorate is 195.65 mL

<u>Explanation:</u>

To calculate the volume of solution, we use the equation used to calculate the molarity of solution:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

Given mass of barium chlorate = 25.0 g

Molar mass of barium chlorate = 304.23 g/mol

Molarity of solution = 0.420 mol/L

Volume of solution = ?

Putting values in above equation, we get:

0.420mol/L=\frac{25.0\times 1000}{304.23\times V}\\\\V=\frac{25.0\times 1000}{304.23\times 0.420}=195.65mL

Hence, the volume of barium chlorate is 195.65 mL

6 0
3 years ago
Atoms that are sp2 hybridized form how many pi bonds?
vova2212 [387]
Sp2 hybridization forms 1 sigma bond and 1 pi bond.
3 0
4 years ago
you are assisting in taking a final impression of a patient's mandibular arch, using an automix material. after transferring the
inessss [21]

Answer:

i

Explanation:

8 0
3 years ago
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