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DIA [1.3K]
3 years ago
14

Which statement is true for an open system?

Chemistry
1 answer:
Bingel [31]3 years ago
3 0

Answer:

Before we get into the first law of thermodynamics we need to understand the relation between heat and work and the concept of internal energy. Just like mass, energy is always conserved i.e. it can neither be created nor destroyed but it can be transformed from one form to another. Internal energy is a thermodynamic property of the system that refers to the energy associated with the molecules of the system which includes kinetic energy and potential energy.

Whenever a system goes through any change due to interaction of heat, work and internal energy, it is followed by numerous energy transfer and conversions. However, during these transfers, there is no net change in the total energy.

Similarly, if we look at the first law of thermodynamics it affirms that heat is a form of energy. What it means is that the thermodynamic processes are governed by the principle of conservation of energy. The first law of thermodynamics is also sometimes referred to as the Law of Conservation of Energy

Explanation:

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Letra A. Doador de H+
6 0
4 years ago
Find the "natural" equilibrium concentration of NO in air in units of molecules/cm3 .
Vedmedyk [2.9K]

Answer:

6400 molecules / cm^3

Explanation:

10.6*10^-16 mol/L * 6.022*10^23 molecules/mol * 1 L / 1000 cm^3 * 1 / 100 L = 6400 molecules / cm^3

6 0
3 years ago
Which two terms relate and why? Energy level, neutron, spectral line
andre [41]

Energy level and spectral line

Explanation:

The energy levels and their spectral lines are related.

Based on the Bohr's model of the atom, he suggested that electrons occupy specific spherical orbits.

These orbits are called energy levels around the nucleus.

The spectral lines are the different colors emitted by atoms when they absorb or lose energy.

  • Electrons can transition between different energy levels when they acquire enough energy that corresponds to that of the energy level
  • By doing so, they emit energy in the process and this is seen as visible spectral lines.
  • Spectral lines are usually studies in order to gain more information about the properties of atoms.

learn more:

Spectral lines brainly.com/question/1857156

#learnwithBrainly

6 0
4 years ago
Suppose that, from measurements in a microscope, you determine that a certain layer of graphene covers an area of 1.50μm2. Conve
Anton [14]
For the answer to the question above,
1∙5µm² = ? m² 
1m * 1m = 1m²     But 1m = 1,000,000µm = 1x 10^6µm   1x10^6µm * 1x10^6µm = 1m²      1x 10^12µm² = 1m² (Now, try dividing both sides by 1x10^12).   1x10^12µm² /(1x10^12) = 1m² /(1x10^12)    1µm² = 0∙000 000 000 001 m² (multiply both sides by by 1∙5).    1∙5µm² = 0∙000 000 000 0015 m²   

 1∙5µm² = 1∙5x 10^-12 m²
I hope this helps
7 0
4 years ago
What is meant by the term compound? Provide an example
PIT_PIT [208]

Answer:

I hope it helps

Explanation:

  • <em>When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of its atoms. When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.Chemical Formula: Compounds are represented by their chemical formula. A chemical formula is a symbolic representation of the proportions of atoms that constitute a particular chemical compound.The chemical formula of water is H2O which shows two atoms of hydrogen and one atom of oxygen have combined to form one molecule of H2O. The chemical formula for common salt is NaCl which shows one atom of sodium and one atom of chlorine combine to form one molecule of NaCl.</em>
6 0
4 years ago
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