Background Info:The standard enthalpy of formation (ΔH∘f) is the enthalpy change that occurs when exactly1 mol of a compound is formed from its constituent elements under standard conditions. The standard conditions are 1 atm pressure, a temperature of 25 ∘C , and all the species present at a concentration of 1 M . A "standard enthalpies of formation table" containing ΔH∘f values might look something like this:SubstanceΔH∘fH(g)218 kJ/molH2(g)0 kJ/molBa(s)0 kJ/molBa2+(aq)−538.4 kJ/molC(g)71 kJ/molC(s)0 kJ/molN(g)473 kJ/molO2(g)0 kJ/molO(g)249 kJ/molS2(g)129 kJ/mol

Question:
What is the balanced chemical equation for the reaction used to calculate ΔH∘f of BaCO3(s)?If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) for aqueous solution.
EXPRESS ANSWER AS A CHEMICAL EQUATION. Please explain for me too!!!

Answers

Answer 1

Answer: You will get at first carbon dioxide by burning C:
$C+O_2=CO_2$
Burn hydrogen to obtain water:
$H_2+(1)/(2)O_2=H_2O$
Combine them:
$CO_2+H_2O=H_2CO_3$
Now react it with Ba:
$Ba+H_2CO_3=BaCO_3+H_2$
To sum up, the reaction is $Ba+C+(3)/(2)O_2=BaCO_3$ , using hydrogen as a catalyst.

Answer 2

Answer:

Answer:

You will get at first carbon dioxide by burning C:

C+O_2=CO_2

Burn hydrogen to obtain water:

H_2+\frac{1}{2}O_2=H_2O

Combine them:

CO_2+H_2O=H_2CO_3

Now react it with Ba:

Ba+H_2CO_3=BaCO_3+H_2

To sum up, the reaction is Ba+C+\frac{3}{2}O_2=BaCO_3, using hydrogen as a catalyst.

Explanation:

Related Questions

Thirty points to who ever can answer this problemDuring an experiment, 104 grams of calcium carbonate reacted with an excess amount of hydrochloric acid. If the percent yield of the reaction was 80.15%, what was the actual amount of calcium chloride formed?CaCO3 + HCl → CaCl2 + CO2 + H2OA. 90.1 gramsB. 92.4 gramsC. 109.2 gramsD. 115.3 grams
Which is larger a zinc atom or a zinc ion? explain
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In the commercial manufacture of nitric acid, how many liters of nitrogen dioxide will produce 30 liters of nitric oxide given that both gases are at STP?3NO2 + H2O 2HNO3 +NO A) 20 liters B) 0.1 liters C) 40 liters D) 90 liters E) 1.01 liters
Which of the following is the correct molecular shape of NH3?А) bentB) linearC) tetrahedralD) trigonal pyramidal

An atom of the element zinc has an atomic number of 30 and a mass number of 65. How many protons does an uncharged zinc atom have?30
35
65
95

Answers

Answer : The correct option is, 30 protons

Explanation :

Element = Zinc

Atomic number = 30

Atomic mass number = 65

As we know that the atomic number is equal to the number of electrons and number of protons.

Atomic number = Number of electrons = Number of protons = 30

Number of neutrons = Atomic mass - Number of protons = 65 - 30 = 35

Therefore, the number of protons an uncharged zinc atom have 30 protons.

Answer:

30 protons

Explanation:

i took the test

The SI unit for current is: joules

volts

ohms

amps

Answers

Ampere is the si unit of current

How do the boiling points of alkenes and alkynes compare to those of alkanes

Answers

The boiling points of alkenes and alkynes are much higher than boiling points of alkanes. Alkenes are organic compounds which contains double bonds between two carbon attoms. Alkynes contains three bonds between two carbon atoms. Alkanes, on the other hand, only has a single bond. Comparing the three, alkanes needs the least amount of energy to break the bonds since it only has a single bond.

Potassium hydroxide is classified as an Arrhenius base because KOH contains(1) OH- ions (2) O2- ions (3) K+ ions (4) H+ ions

Answers

Answer : The correct option is, (1) $OH^-$ ions.

Explanation :

According to the Arrhenius concept, an acid is a type of substance which ionizes in water to gives $H^+$ ions (hydronium ions or hydrogen ions) and a base is a type of substance which ionizes in water to gives $OH^-$ ions (hydroxide ions).

As we know that KOH is a base which ionizes in water to gives $OH^-$ ions (hydroxide ions) and $K^+$ ions.

Hence, potassium hydroxide is classified as an Arrhenius base because KOH contains $OH^-$ ions.

The answer is (1)OH- ions. The base has more OH- ions while the acid has more H+ ions. And if you dissolve them into water, the pH of the solution is also different. Base has pH>7 and acid has pH<7 at room temperature.

3 During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms(1) are lost by the atoms
(2) are gained by the atoms
(3) return to lower energy states within the atoms
(4) move to higher energy states within the atoms

Answers

Answer:

The correct answer is (3).
Return to lower energy states within the atoms

Explanation:

When an atom absorbed a specific energy, the electron move from lower energy state to higher energy state known as excited energy state. After sometime, the excited state electron come back to lower energy orbital (Ground state) with emission of light as in this case of lithium, red light is emitted.

Please Help!!!
Convert 2.84 × 1025 molecules of H2O2 to Moles.

Answers

2.911.
should be the wright answer

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Pentane, C5H12, will react as shown below:____C5H12(l) + ____O2 --- ______CO2 +_______ H2OH20(g)1. Balance the equation above by putting coefficients into each blank space.1C5H12+ 8O2----- 5CO2+ 6 H2O (this is what I got)2. How many atoms of oxygen are in 144 grams of pentane?step 1: 144g of C5H12*(1mole/72.17)= 1.995moles of C5H12step 2: 1.995moles of C5H12*(8moles of O2/1mole of C5H12)= 15.962 moles of O2step 3: 15.962 moles of O2*(6.02*10^23 atoms of O2/1mole of O2)= 9.609*10^24 atoms of O2 (I don't know if I did this right)3. How many atoms of oxygen are in 192 grams of carbon dioxide gas?step 1: 192 grams of CO2 *(1mole of CO2/44.01grams of CO2)= 4.363 moles of CO2step two: 4.36moles of CO2* ( 1 mole of O2/1mole of CO2)= step 3: 4.363* (6.02*10^23) = 2.627*10^24 atoms of O2 (I don't know if this is correct.4. A) CIRCLE ONE: True or False:reactant you begin with fewer grams of is your limiting reactant.B) If 32 g of oxygen gas and 32 g of pentane are combined, how much water will be produced, in moles? (Use your reaction from the top of the first page)NEED HELP ASAP THANK YOU!!!

A student needs .575 moles of sodium chloride for an experiment. how many grams she she mass out

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