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3 years ago

What is the definition of electrical energy?

1 answer:

7 0

Answer: Electrical energy is defined as an electric charge that lets work be accomplished. An example of electrical energy is power from a plug outlet. YourDictionary definition and usage example.

Explanation:

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Calculate the standard enthalpy of the reaction, ΔH∘rxn, for the thermite reaction: 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s) Elements in

alina1380 [7]

Answer:

The answer to your question is: ΔH = -849.5 KJ/mol

Explanation:

Data

ΔH = ?

H Fe2O3 = -825.5 KJ/mol

H Al2O3 = -1675 KJ/mol

H Al = 0 KJ/mol

H Fe = 0 KJ/ mol

Reaction

2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s)

ΔH = H products - H reactants

ΔH = H Al2O3 - H Fe2O3

ΔH = -1675 - (- 825.5)

ΔH = -1675 + 825.5

ΔH = -849.5 KJ/mol

3 0

3 years ago

Read 2 more answers

Vaporized water is also known as

viva [34]

Answer:

fog

Explanation:

4 0

3 years ago

What is the name of the solid that will form from the following reaction: a

Reptile [31]

Answer:

yeild solid iron

Explanation:

When two solutions of ionic compounds are mixed, a solid may form. This type of reaction is called a precipitation reaction, and the solid produced in the reaction is known as the precipitate.

4 0

3 years ago

What would be the freezing point of a 1.7 mole aqueous ethylene glycol solution? The freezing point depression constant for wate

nata0808 [166]

Answer:

$-3.2^oC$

Explanation:

In order to answer this question, we need to be familiar with the law of freezing point depression. The law generally states that mixing our solvent with some particular solute would decrease the freezing point of the solvent.

This may be expressed by the following relationship:

$\Delta T_f=iK_fb$

Here:

$\Delta T_f=T_{initial}-T_{final}$ is the change in the freezing point of the solvent given its initial and final freezing point temperature values;

$i$ is the van 't Hoff factor (i = 1 for non-electrolyte solutes and i depends on the number of moles of ions released per mole of ionic salt);

$K_f$ is the freezing point depression constant for the solvent;

$b=\frac{n_{solute}}{m_{solvent}}$ is molality of the solute, defined as a ratio between the moles of solute and the mass of solvent (in kilograms).

We're assuming that you meant 1.7-molal solution, then:

$b=1.7 m$

Given ethylene glycol, an organic non-electrolyte solute:

$i=1$

The freezing point depression constant:

$K_f=1.86^oC/m$

Initial freezing point of pure water:

$T_{initial}=0.00^oC$

Rearrange the equation for the final freezing point and substitute the variables:

$T_f=T_o-iK_fb=0.00^oC-1\cdot1.86^oC/m\cdot1.7 m=-3.16^oC$

8 0

3 years ago

Explain how carbon is conserved in the carbon cycle.

jek_recluse [69]

<h2> Interconversion of energy.</h2>

Explanation:

Carbon moves from plants and animals to soils in the form of cycle.
When we take in oxygen we release carbon dioxide gas $(CO_{2})$ into the atmosphere.
Animals and plants give carbon dioxide gas through the process called respiration and transpiration.
From fossil fuels carbon moves in the atmosphere.
The fuels like wood or coal when burned releases carbon dioxide into the atmosphere.
The Matter is conserved in the carbon cycle as carbon absorbs energy and then it releases the same amount of energy.
Carbon changes from one form to another, but the total amount of carbon remains the same.

8 0

3 years ago