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svlad2 [7]
3 years ago
6

What is the value for (delta)G at 1000 K if (delta)H = -220 kJ/mol and (delta)S = -0.05 kJ/(molK)?

Chemistry
2 answers:
lesantik [10]3 years ago
8 0

Answer:

D. -170 kJ (apex)

tankabanditka [31]3 years ago
6 0
The system is isothermal, so we use the formula:
(delta)G = (delta)H - T (delta) S

Plugging in the given values:
(delta)G = -220 kJ/ mol - (1000K) (-0.05 kJ/mol K)
(delta)G = -170 kJ/mol

If we take a basis of 1 mol, the answer is
D. -170 kJ 
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What is true of dynamic equilibrium?
Doss [256]

Answer:

Dynamic equilibrium is a state in which reactant is converted into products at the same rate. At the beginning of a reaction, the reactants are converted to products and reaction goes into forwarding direction.

But in reversible reaction products start changing into reactants and reaction goes in the reverse direction until an equilibrium is reached. The state where the rates of all the reactants and products become equal and no more changes take place except the concentration is called dynamic equilibrium.

All the changes in dynamic equilibrium cancel out each other and the system seems to be at equilibrium.

7 0
3 years ago
What mass of water is formed when 16g of hydrogen react with excess oxygen​
artcher [175]

Hello!

To start off, we must look at atomic masses. Atoms all have different weights, so we must first find hydrogen and oxygen's atomic masses.

Oxygen: 16.00 amu

Hydrogen: 1.01 amu

Now, moving on to the weight of water itself. Water has the formula of H20, with two hydrogen atoms and one oxygen. Therefore, <u>add up the amus to get the weight of one molecule of water.</u>

1.01 + 1.01 + 16.00 = 18.02 amu

Now, to see the ratio of each component. Since hydrogen weighs a total of 2.02 amu (1.01 + 1.01) in the entire atom, we can state that hydrogen makes up about 0.112 of the weight of water. Now apply that ratio to 16 g, and solve.

0.112x = 16

142.857143 = x

So therefore, about 143 grams of water are made when 16g of hydrogen reacts with excess oxygen.

Hope this helps!

8 0
3 years ago
Read 2 more answers
Complete the mechanism for the reaction by adding the missing curved arrows, atoms, bonds, charges, and nonbonding electron pair
Keith_Richards [23]

Answer:

See explanation below

Explanation:

In picture 1 attached, we have the starting structure. In picture 2, you have the answer for this.

Basically this is an acid base reaction to promove then, a condensation of the molecule.

In the first step, the carbonile substract a H atom from the HCl. Then, by resonance the OH+, pass the charge to the carbon, which is tertiary and can be easily stabilized. Now, after this, the Chlorine substract an Hydrogen to get a double bond on the carbon with the charge, and this be stable. Now, a second molecule of benzaldehyde reacts with this, so we can have a condensation product.

See picture 2 for complete mechanism.

4 0
3 years ago
Be sure to answer all parts. find the most acidic hydrogen in tert−butyl methyl ketone and write a chemical equation for the pro
sleet_krkn [62]
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In <span>tert−butyl methyl ketone there are two carbons at each alpha position. Among these two carbons only methyl carbon contains hydrogen atoms while the second one is bonded to further three carbons making it Quaternary carbon. The base abstracts proton from methyl group and enolate is formed. 

</span>tert−butyl methyl ketone in this case acts as acid, Hydroxyl ion acts as base, while the enolate generated is the conjugate base of <span>tert−butyl methyl ketone and Water produced is the conjugate acid of hydroxide ion.</span>

7 0
3 years ago
What classification is salt?
mariarad [96]

Answer:

Sodium chloride

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3 0
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