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evablogger [386]
3 years ago
15

Which of the following statements is TRUE? Question 1 options: There is a "heat tax" for every energy transaction. A spontaneous

reaction is always a fast reaction. The entropy of a system always decreases for a spontaneous process. Perpetual motion machines are a possibility in the near future. None of these are true.
Chemistry
1 answer:
pentagon [3]3 years ago
5 0

Question:

Which of the following statements is TRUE?

A. Perpetual motion machines are a possibility in the near future.

B. The entropy of a system always decreases for a spontaneous process.

C. A spontaneous reaction is always a fast reaction.

D. There is a "heat tax" for every energy transaction.

E. None of the above are true.

Answer:

The correct answer is D)

There is a "heat tax" for every energy transaction.

Explanation:

Heat and work are two different ways in which energy is moved from one device to another. In the field of thermodynamics the distinction between Heat and Work is significant. The transfer of thermal energy between systems is heat. This is what is referred to as "heat tax".

No other statement in the question above is correct.

Cheers!

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The name of that product is 1-nonene.

The sufix ene is because it is an alkene, which comes from the fact that it has a double bond.

The prefix none is because it has 9 carbon.

And the use of number 1 is because the double bond is in the carbon number 1.
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4 years ago
Calculate the percentage of the void space out of the total volume occupied by 1 mole of water molecules. The density of water i
gtnhenbr [62]

Answer:

The percentage of the void space out of the total volume occupied is 93.11%

Explanation:

A mole of water contains 2 atoms of hydrogen and 1 atom of oxygen.

To calculate the volume of a mole of water, we calculate 2 times the volume of the hydrogen atom and 1 times the volume of the oxygen atom

Let's calculate this one after the other.

For the hydrogen, formula for the volume will be

V_{hydrogen = 2 × 4/3 × π × r_{H}^{3}

where r_{H}^{3} = 37 pm which is read as 37 picometer (1 picometer = 10^-12 m) = 37 × 10^{-12} meters

Volume of the hydrogen = 8/3 × (37 × 10^-12)^3 = 4.05 * 10^-31

we multiply this by the avogadro's number = 6.02 * 10^23

= 4.05 * 10^-31 * 6.02 * 10^23 = 2.6 * 10^-8 m^3

We do same for thr oxygen, but this time we do not multiply the volume of the oxygen by 2 as we have only one atom of oxygen

Volume of oxygen = 4/3 * π * (73 * 10^-12) ^3 * avogadro's number = 9.81 * 10^-7 m^3

adding both volumes together, we have 1.24 * 10^-6 m^3 or simply 1.24 ml ( 0.01 m = 1 ml)

Dividing the molar mass of one mole of water by its density, we can get the volume of 1 mole of water

= (18g/mol)/(1 g/ml) = 18 ml/mol

Now we proceed to calculate the volume of void = Total volume - volume of molecule = 18 - 1.24 = 16.76 ml

Now, the percentage of void = volume of void/total volume * 100%

= 16.76/18 * 100% = 93.11%

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Answer:

D. 25%

Explanation:

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A student compares the boiling point of substances having different intermolecular forces. Which dependent variable did the stud
maks197457 [2]

Boiling point

Explanation:

The likely dependent variable the student used in this experiment is boiling point temperature

The amount of heat supplied will determine when a substance will boil or not based on the intermolecular force in them.

  • In an experiment, the dependent variable is treated as the effect produced.
  • It is the variable that relies on the outcome of the experiment.
  • The independent variable is responsible for the changes in the experiment.
  • The cause is the independent variable. It does not rely on the outcome of the experiment.
  • The dependent variable is the boiling point.
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learn more:

Experiments brainly.com/question/5096428

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