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Calculate the pressure of O2 (in atm) over a sample of NiO at 25.00°C if ΔG o = 212 kJ/mol for the reaction. For this calculatio

Pepsi [2]

Answer : Given data ;
Δ G° = 212 KJ/molTemperature is = 25+273 = 298 KAnd gas constant R = 0.008314 KJ/mol

The reaction is NiO(s) ⇌ Ni(s) + $\frac{1}{2} O_{2 _{(g)}$ We can find out the pressure on oxygen by using the equation of gibb's free energy with remainder quotient which is, ΔG = ΔG° +RT lnQ
when at equilibrium Q = K, here K is equilibrim constant, and ΔG becomes 0;
so we get, 0 = ΔG° + RT ln K
on rearranging we get, ln K = ΔG° / (RT)
ln K = 212 / (0.00831 X 298) = 85.6
Here, now K = = 1.51 X $10^{37}$
When we get K = 1.51 X $10^{37}$

But, K = $(PO_{2})^ \frac{1}{2}$ So, (1.51 X $10^{37}$ ) $^ \frac{1}{2}$ = 3.87 X $10^{18}$
Hence, the pressure of oxygen will be = 3.87 X $10^{18}$ Pa

Now, Pa to atm conversion will be 3.756 X $10^{13}$ atm

7 0

2 years ago

Both the freezing temperature and the melting temperature of water are the same(0°C). Explain why a substance like water freezes

Ahat [919]

It is approximately 0. It could be barley higher or lower for both. You have to take the altitude into consideration.

5 0

3 years ago

Suppose you wanted to know how many grams of KCl would be left if 350mL of

strojnjashka [21]

Answer:

52.2g of KCl would be left

The mass of KCl will remain despite the solution is been heated

Explanation:

When you are heating a solution, just the solvent (In this case, water), will be evaporated and, in theory, the mass of KCl will remain despite the solution is been heated.

Now, the mass of KCl that you can obtain from 350mL of a 2.0M solution will be:

Moles KCl:

350mL = 0.350L * (2.0mol / L) = 0.700 moles

Mass KCl -Molar mass: 74.55g/mol-:

0.700mol * (74.55g/mol) = 52.2g of KCl would be left

8 0

2 years ago

Which of the following best describe the chronological way of specimen preparation?

nata0808 [166]

Answer:

There are many reasons to examine human cells and tissues under the microscope. Medical and biological research is underpinned by knowledge of the normal structure and function of cells and tissues and the organs and structures that they make up. In the normal healthy state, the cells and other tissue elements are arranged in regular, recognizable patterns. Changes induced by a wide range of chemical and physical influences are reflected by alterations in the structure at a microscopic level, and many diseases are characterized by typical structural and chemical abnormalities that differ from the normal state. Identifying these changes and linking them to particular diseases is the basis of histopathology and cytopathology, important specializations of modern medicine. Microscopy plays an important part in haematology (the study of blood), microbiology (the study of microorganisms including parasites and viruses), and more broadly in the areas of biology, zoology, and botany. In all these disciplines, specimens are examined under a microscope.

hope it helps 

8 0

1 year ago

Read 2 more answers

What is the product of the oxidation reaction of isopropyl alcohol with sodium hypochlorite?

Archy [21]

<h3>OXIDATION REACTION</h3>

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