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1 year ago

Predict the sign of the entropy change, ΔS, for the following processes. Explain the reason for each of the predictions.

Chemistry

1 answer:

Nastasia [14]1 year ago

6 0

The sign of the entropy change, ΔS, for the following processes include:

I2 (s) + ½ Cl2 (g) ← → ICl (g) - positive

3 Ag (s) + 4 HNO3 (aq) → 3AgNO3 (aq) + NO (g) + 2 H2O (l) - positive

Cl2 (g) → Cl2 (l) - negative

C5H12 (g) + 8 O2 (g) → 5 CO2 (g) + 6 H2O (l) - negative

What is Entropy?

This is referred to the degree of randomness or disorderliness of a system and is denoted as S.

Entropy change is usually positive when solid or liquid reactant is converted into gas product and vice versa.

Read more about Entropy here brainly.com/question/419265

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A decrease in pressure has the greatest effect on a solution that contains.. ?

Naddika [18.5K]

<h3><u>Answer;</u></h3>

A gas in a liquid

<h3><u>Explanation;</u></h3>

Pressure affects the solubility of gases. According to Henry's law, the solubility of a gas in a liquid is proportional to the partial pressure of the gas above the liquid at a given temperature,
Therefore; For the solubility of gases in liquids, as pressure increases, solubility increases. Hence pressure will have a effect on a solution with a gas in liquid.

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3 years ago

Examine the ph scale below. How does household bleach compare to household ammonia?

Kazeer [188]

Answer is: household ammonia has 10 times higher H⁺ concentration.

1) pH(household ammonia) = 11.5.

pH = -log[H⁺], approximately the negative of the base 10 logarithm of the molar concentration of hydrogen ions.

[H⁺] = 10∧(-pH).

[H⁺] = 10∧(-11.5).

[H⁺] = 3.16·10⁻¹² M; concentration of hydrogen ions.

2) pH(household bleach) = 12.5.

[H⁺] = 10∧(-12.5).

[H⁺] = 3.16·10⁻¹³ M.

3) 3.16·10⁻¹² M / 3.16·10⁻¹³ M = 10.

6 0

3 years ago

Read 2 more answers

Determine the total time that must elapse until only ¼ of an original sample of the radioisotope Rn-222 remains unchanged.

Arte-miy333 [17]

Answer:

7.6 days

Explanation:

Radon is a radioactive element and Radon-222 is it's most stable isotope. The half-life of Radon-222 has been found to be approximately 3.8 days.

Let, the initial amount of the Rn-222 = 1 = A

Final amount = $\frac{1}{4}$ = A'

We will use the following relation for calculating time elapsed in the decay

$A' = A(\frac{1}{2} )^\frac{t}{t_1_/_2} }$

Thus,

$\frac{1}{4} =1(\frac{1}{2} )^\frac{t}{3.8}$

We can write is as,

$(\frac{1}{2} )^2=(\frac{1}{2} )^\frac{t}{3.8}$

Since the base in both sides are equal, powers can also be equal and thus,

$2=\frac{t}{3.8}$

So, t = 7.6 days

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2 years ago

A sample of a substance has a mass of 4.2 grams and a volume of 6 milliliters. The density of this substance BLANK) ( grams/mill

elena55 [62]

0.7 my teacher just gave me the answer i got too lazy to explain why

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3 years ago

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The price elasticity of demand measures a. buyers’ responsiveness to a change in the price of a good. b. the extent to which dem

-BARSIC- [3]

Option A

The price elasticity of demand measures buyers’ responsiveness to a change in the price of a good.

<u>Explanation:</u>

Price elasticity of demand holds the responsiveness of need subsequent a variation in a product's cost. In different terms, it’s a process to comprehend out the responsiveness of buyers to inconstancies in cost. Price elasticity estimates the responsiveness of the measure necessitated or outfitted of a good to a shift in its demand.

The price elasticity of demand is the rate fluctuation in the amount demanded of a good or assistance distributed by the percentage shift in the price. Considering the quantity demanded habitually declines with value, the price elasticity coefficient is essentially forever negative.

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2 years ago