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2 years ago

4. Consider the following reaction:

Chemistry

1 answer:

Lyrx [107]2 years ago

4 0

Answer:

High temperatures

Explanation:

NaHCO₃ (8) + HCH,O₂ (aq) → H₂O (l) + CO₂ (g) + NaC,H₃O₂ (aq)

As the flask gets cooler to the touch as the reaction proceeds, the reaction is endothermic. This means that ΔH is positive (ΔH>0).

As a gas is formed (bubbles are formed), ΔS is positive (ΔS>0).

In terms of ΔG:

ΔG = ΔH - TΔS

In order for the reaction to be thermodynamically favorable, ΔH has to be negative, thus:

The reaction is favorable if TΔS > ΔH.

The greater the temperature, the easier it would be for TΔS to be greater than ΔH.

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What are the reagents for BaCO3(s)

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The reagents for BaCO₃ is

BaO and CO₂

Explanation

Reagent is a substance that bring about a chemical reaction when added to a system.

Some reagent may be added to see if a reaction has occurred.

BaO and Co₂ are reagent since they react to produce BaCO₃ as below

BaO(s) + CO₂(g) → BaCO3(s)

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3 years ago

How does evaporation show interactions among the hydrosphere and atmosphere?

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Answer:

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2 years ago

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If 495 milliliters of carbon dioxide at 25°C and 101.3 kilopascals reacts with excess water, what is the theoretical yield of ca

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Answer:- 1.24 g

Solution:- The balanced equation for the formation of carbonic acid by the reaction of carbon dioxide with water is:

$CO_2+H_2O\rightarrow H_2CO_3$

From balanced equation, there is 1:1 mol ratio between carbon dioxide and carbonic acid. So, moles of carbonic acid will be equal to the moles of carbon dioxide used.

Moles of carbon dioxide can be calculated using ideal gas law equation as it's volume, temperature and pressure are given.

we need to convert mL to L, degree C to kelvin and kilopascals to atm.

$495mL(\frac{1L}{1000mL})$ = 0.495 L

25 + 273 = 298 K

$101.3kPa(\frac{1atm}{101.3kPa)})$

= 1 atm

Ideal gas law equation is:

PV = nRT

We want to find out the n, so let's rearrange this:

$n=\frac{PV}{RT}$

R is the universal gas constant and it's value is $\frac{0.0821atm.L}{mol.K}$ .

Let's pug in the values in the equation and solve it for n.

$n=\frac{1*0.495}{0.0821*298}$

n = 0.02 mol

To convert the moles to grams we multiply the moles by the molar mass of carbonic acid.

Molar mass of carbonic acid = 2(1.008)+12.01+3(16.00)

= 2.016+12.01+48.00

= 62.03 gram per mol (rounded to two decimal places)

Let's multiply the moles by molar mass:

$0.02mol(\frac{62.03g}{mol})$

= 1.24 g

So, the theoretical yield of carbonic acid is 1.24 g.

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2 years ago

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The graph represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, w

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Temperature will raise and water will evaporate

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2 years ago

The product of adding two molecules of an alcohol to an aldehyde in the presence of acid is a(n):______

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Answer:

Explanation:

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To achieve effective hemiacetal or acetal formation, two additional features must be implemented. First, an acid catalyst must be used because alcohol is a weak nucleophile and second the water produced with the acetal must be removed from the reaction.

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3 years ago

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