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kow [346]
3 years ago
14

Identify the type of energy involved in each step:

Chemistry
2 answers:
horrorfan [7]3 years ago
6 0

Answer: 1) Electric energy

2) Heat energy

3) Thermal energy

Explanation:

1) You flip on the switch on a lamp - <u>Electric energy</u>.

Because, when we flip on the switch, the chemical energy of lamp is converted into electric energy as the electrons moves with the help of circuit.

2) The light bulb lights up -  <u>Heat energy</u>

when a light bulb lights up after there is flip on the switch on a lamp, then electric energy is converted into heat energy as the electrons passes through the resistor which makes bulb lights up.

3) The light bulb causes the lamp shade to melt - <u>Thermal energy</u>

Thermal energy is occurred due to change in temperature  i.e heat energy, in which objects start moving within the object.

When the bulb lights up, its temperature get increased makes the lamp shade to melt, so the heat energy is converted into thermal energy.

77julia77 [94]3 years ago
5 0

Answer:

a. Electric Energy

b. Light Energy

c. Thermal Energy

Explanation:

a. When a lamp is turned on by means of a switch, electric energy is usually used, since that is the form of energy that is generated when there is a potential difference between two points, which allows to establish an electric current, that electric current travels through the wires up to the bulb of the lamp

b. In this case a case of light energy is presented since that is the energy transported by the light and that is manifested on the matter in different ways, one of them is to remove the electrons from the metals. This is what usually happens in some types of light bulbs, that when the displacement of the electrons is promoted, a beam of light is generated.

c. The last case is a case of thermal energy, since this energy is that expressed as the total kinetic energy resulting from the random movements of atoms and molecules. This was what could happen in case b, when the beam of light was generated. This energy is released in the form of heat, and may present high temperatures.

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A balanced reaction equation must have the same number of atoms of each element on both sides of the equation. The reaction C2H5
Aleks04 [339]
<h3>Answer:</h3>

Atoms of elements on the reactants side

  • 2 Carbon atoms
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<h3>Explanation:</h3>
  • The equation; C₂H₅OH+ 3O₂ →2CO₂+ 3H₂O is balanced.
  • A balanced chemical equation has an equal number of atoms of each element on either side of the equation.
  • For example, in the equation given, the number of atoms of each element is equal on both sides of the equation.
  • There are 2 carbon atoms, 6 hydrogen atoms, and 7 hydrogen atoms on either side of the equation.
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6 0
4 years ago
When discussing distances between objects in the solar system, which term do you use?
VLD [36.1K]
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5 0
2 years ago
A white crystalline salt conducts electricity when it is melted and when it dissolves in water.
sergeinik [125]

Answer: Option (a) is the correct answer.

Explanation:

Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.

So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.

As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.

Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.

Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.

7 0
3 years ago
Click on the box to choose which compound has a greater difference in electronegativities of its members. Use the
4vir4ik [10]

Answer:

See the example below.

Explanation:

Let us make an example with a group of compounds to apply the general <em>trends of electronegativities</em> within families to find which compound has a greater difference in electronegativities.

Use this group.

  • a. HBr
  • b. HI
  • c. HF
  • d. HCl
  • e. H₂

Br, I, F, and Cl belong to the halogen family (group or column 17 of the periodic table).

Electronegativity is a relative measure of how strong an atom atracts the bonding electrons in a compound.

Since the strength of attracion of the valence electrons by the nucleus of an atom decreases as the size of the atom incease, in a family of elements (same group) the electronegativity decreases as you go down in the group.

The order of the halogens from top to bottom in the column in the periodic table is F, Cl, Br, and I.

Thus, the order of their electronegativiies is: F > Cl > Br > I. F is the most electronegative atom, and all those elements have higher electronegativy than H. (The electronegativiy of I is 2.66 and the electronegativity of H is 2.2). Thus, including H, the rank of the electronegativities is F > Cl > Br > I > H.

Thus, the greater difference in electronegativities is for HF (option a.).

Note, that the difference in electronegativites of the atoms of the molecule H₂ is zero, since both atoms have the same electronegativity.

3 0
3 years ago
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