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Alchen [17]
2 years ago
15

• How did your experimental absolute zero value compare to the accepted value?

Chemistry
1 answer:
Murrr4er [49]2 years ago
5 0

The experimental absolute zero value is less when compared to the accepted value of absolute zero.

<h3>What is absolute zero?</h3>

Absolute zero is defined as the temperature in which the lowest energy possible is attained in a thermodynamic system.

Absolute zero temperature has an accepted values of 0 Kelvin or -273.15 degrees Celsius.

At absolute zero, it is assumed that the volume of an ideal gas becomes zero. However, it has not been possible to cool any gas to absolute zero.

Based on the graph of temperature against volume of gases, the experimental absolute zero extrapolated from the graph where volume of the gases becomes zero is -285 degrees Celsius.

Therefore, the experimental absolute zero value is less when compared to the accepted value.

Learn more about absolute zero at: brainly.com/question/1191114

#SPJ1

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PbSO4 has a Ksp = 1.3 * 10-8 (mol/L)2.
Oduvanchick [21]

i. The dissolution of PbSO₄ in water entails its ionizing into its constituent ions:

\mathrm{PbSO_{4}}(aq) \rightleftharpoons \mathrm{Pb^{2+}}(aq)+\mathrm{SO_4^{2-}}(aq).

---

ii. Given the dissolution of some substance

xA{(s)} \rightleftharpoons yB{(aq)} + zC{(aq)},

the Ksp, or the solubility product constant, of the preceding equation takes the general form

K_{sp} = [B]^y [C]^z.

The concentrations of pure solids (like substance A) and liquids are excluded from the equilibrium expression.

So, given our dissociation equation in question i., our Ksp expression would be written as:

K_{sp} = \mathrm{[Pb^{2+}] [SO_4^{2-}]}.

---

iii. Presumably, what we're being asked for here is the <em>molar </em>solubility of PbSO4 (at the standard 25 °C, as Ksp is temperature dependent). We have all the information needed to calculate the molar solubility. Since the Ksp tells us the ratio of equilibrium concentrations of PbSO4 in solution, we can consider either [Pb2+] or [SO4^2-] as equivalent to our molar solubility (since the concentration of either ion is the extent to which solid PbSO4 will dissociate or dissolve in water).

We know that Ksp = [Pb2+][SO4^2-], and we are given the value of the Ksp of for PbSO4 as 1.3 × 10⁻⁸. Since the molar ratio between the two ions are the same, we can use an equivalent variable to represent both:

1.3 \times 10^{-8} = s \times s = s^2 \\s = \sqrt{1.3 \times 10^{-8}} = 1.14 \times 10^{-4} \text{ mol/L}.

So, the molar solubility of PbSO4 is 1.1 × 10⁻⁴ mol/L. The answer is given to two significant figures since the Ksp is given to two significant figures.

8 0
3 years ago
(2 Question 6 Without modifying the apparatus, how could the reliability of the results be increased?​
geniusboy [140]

Explanation:

Reliability can be improved by completing each temperature more than once and calculating an average.

3 0
2 years ago
Using the following phase diagram, which line segment describes the interface between solid and vapor?
stepladder [879]
In the given <span>phase diagram, the line segment that describes the interface between solid and vapor is A-B. The rest of the choices do not answer teh question above</span>
7 0
3 years ago
For the following reaction, 20.4 grams of nitrogen monoxide are allowed to react with 5.10 grams of hydrogen gas . nitrogen mono
amm1812

Answer:

9.52g of N2

Explanation:

The equation of the reaction is given as;

2NO(g) + 2H2(g) → N2(g) + 2H2O(l)

From the stochiometry of the reaction;

2 mol   :    2 mol       :   1 mol     :   2 mol

60g     :      4g      :     28g   :  

( Mass = Number of moles * Molar mass)

Converting the masses given to moles;

Number of moles of NO = mass / molar mass = 20.4 / 30 = 0.68

Number of moles of H2 = mass / molar mass = 5.10 /  2 = 2.55

In this reaction, the limiting reactant is NO

60g of NO produces 28g of N2,

20.4g of NO would produce xg of N2

60 = 28

20.4 = X

X = (20.4 * 28) / 60

X = 9.52g

7 0
3 years ago
Qual é a diferença entre um a corrente elétrica e a diferença potencial elétrica?
Natalija [7]

Answer:

Eu não falo português, usei o Google Translate. Desculpe se o texto está incorreto!

Explanation:

A corrente é um fluxo de carga. A corrente é medida através de um componente. Diferença potencial é a energia usada entre dois pontos em um circuito.

7 0
3 years ago
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