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gogolik [260]
2 years ago
9

What are the standard temperature and pressure conditions enthalpy is usually measured under?

Chemistry
1 answer:
oksian1 [2.3K]2 years ago
8 0

The standard temperature and pressure conditions enthalpy is usually measured under are 1kPa and 273K (option A).

<h3>What is enthalpy?</h3>

Enthalpy in thermodynamics is a measure of the heat content of a chemical or physical system.

Enthalpy is the sum of the internal energy and pressure times volume It can be calculated using the following formula:

H = E + P V

Where;

H = Enthalpy

E = internal energy

P = pressure

V = volume

However, the enthalpy of a substance is usually measured under standard temperature and pressure.

  • The standard temperature is 273 Kelvin or K
  • The standard pressure is 1kPa

Learn more about enthalpy at: brainly.com/question/13996238

#SPJ1

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Can we move only one electron from its orbit to another orbit of lower energy without moving other electrons of the atom? well i
Mrac [35]
Yes, it can happen.

If all the lower energy orbits are already filled with electrons, then it cannot happen since the lower orbitals will already be full, hence another electron will have to move.

However, if the lower energy orbits are not full (for instance if one excited electron goes back to its normal state), then it can happen.
4 0
3 years ago
Please help! Find the distance to each destination in AU. Use the correct conversion factor.
Zepler [3.9K]

Explanation:

The question involves converting from one unit (Kilometres) to another unit (Astronomical unit)

The relationship between both units is given as;

1 Km = 6.68459e-9 Au

Kulper belt

6.5 billion km = 6.5e9 Km

1 Km = 6.68459e-9 Au

6.5e9 Km = x

Solving for x;

x = 43.45 Au

Alpha Centauri

44 trillion km = 4.4e13

1 Km = 6.68459e-9 Au

4.4e13 km = x

Solving for x;

x = 294121.83 Au

4 0
3 years ago
An automobile gasoline tank holds 23 kg of gasoline. When the gasoline burns, 86 kg of oxygen is consumed, and carbon dioxide an
ira [324]

Question:

What is the total combined mass of carbon dioxide and water that is produced?

Answer:

<u><em>109 kg</em></u>

Explanation:

When 23 kg of gasoline burns by consuming 86 kg oxygen, they produce carbon dioxide and water. To find the total combined mass of carbon dioxide and water, we will use mass conversation law.

According to mass conversation law, the mass of the product is equal to the mass of reagent.

Mass of reagent = Mass of product

In this reaction,

Gasoline + O2 → CO2 + H2O

23 kg + 86 kg → ?

23 kg + 86 kg =  109 kg

Combined mass of carbon dioxide and water will be 109 kg.

4 0
3 years ago
Complete the following equation: 250/96Cm ——-&gt; ? + 4 1/0n
vfiekz [6]

Answer:

²⁵⁰₉₆Cm → ²⁴⁶₉₆Cm + 4 ¹₀n

Explanation:

The complete equation is;

²⁵⁰₉₆Cm → ²⁴⁶₉₆Cm + 4 ¹₀n

  • The above equation is an example of a nuclear reaction in which unstable atom of Cm emits neutrons to become more stable.
  • Radioactive isotopes undergo radioactivity or decay to attain stability, they do so by emitting particles such as alpha, beta particles or a neutron.
  • An atom of Cm-250 undergoes decay and emits four neutrons to form an atom of Cm-246.
3 0
3 years ago
3. If an ion contains 10 electrons,<br> 12 protons, and 13 neutrons, what is<br> the ion's charge?
storchak [24]

Answer:

The charge of the ion is 2+.

Explanation:

The amount of neutrons is extra information. You just need to compare the amount of electrons to the amount of protons for the ion's charge.

5 0
4 years ago
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