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lbvjy [14]
3 years ago
11

What was Johann Dobereiner’s contribution to the development of the periodic table?

Chemistry
2 answers:
Novay_Z [31]3 years ago
5 0

He identified triads of elements that had similar properties

umka21 [38]3 years ago
3 0
<span>he introduced his law of triads. each triad was a group of three elements</span>
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A Carnot cycle operates between the temperatures limits of 400 K and 1600 K, and produces 3600 kW of net power. The rate of entr
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The rate of entropy change:

The rate of entropy change of the working fluid during the heat addition process is 3 kW/K

What is the Carnot cycle?

  • The Carnot Cycle is a thermodynamic cycle made up of reversible isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression processes in succession.
  • The ratio of the heat absorbed to the temperature at which the heat was absorbed determines the change in entropy.

The entropy of a system:

The rate of heat addition is expressed as,

Q = \frac{WT_{H}}{T_{H}- T_{L}}

The entropy of a system is a measure of how disorderly a system is getting. The rate of entropy generation during heat addition is,

S_{gen} = \frac{Q}{T_{H}} = \frac{W}{T_{H} - T_{L}}

Calculation:

<u>Given:</u>

T_{L} = 400K

T_{H} = 1600K

W = 3600 kW

Put all the values in the above equation, and we get,

S_{gen} = \frac{W}{T_{H} - T_{L}} = \frac{3600}{1600-400} = 3 kW/K

The rate of entropy change is 3 kW/K

Learn more about the Carnot cycle here,

brainly.com/question/13002075

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1 year ago
List examples of organisms from the movie that represent each of the six kingdoms. Monera (Archaebacteria/Eubacteria): Protista:
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Paracanthurus- Dory
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What happens if you put sugar in someone's gas tank?
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The sugar reacts with the gas, turning it to a semi-solid and sticky substance; clogging the gas lines along with many other things.
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In bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus,
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Answer is: energy is absorbed.

According to the Bohr model of the atom:

1. Electrons orbit the nucleus in orbits that have a set size and energy.

2. Energy levels of electrons are discrete (certain discrete values of energy).

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3 years ago
A negatively charged particle is attracted to A. All particles that are located close by. B. Only particles that are large. C. N
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Answer:

D. Positively charged particles

Explanation:

Negatively charged particles are attracted to positively charged particles and repelled against negatively charged particles

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2 years ago
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