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olasank [31]
3 years ago
5

A _____________________ change does not change what a substance is. If heat is added to ice, a physical change occurs because on

ly the _______________ of matter has changed. The term for changing a solid to a liquid is _________________. Adding more heat can turn the water into a gas, or _____________. The term for changing a liquid to a gas is __________________. Changes of state can be reversed as well. A gas turns into a liquid by _____________________. A liquid turns into a solid by ______________________. On very rare occasions, a solid turns into a gas through _____________________. The reverse is a gas turning into solid, or _________________________. ______________________ change produces a new substance because a chemical reaction has taken place. We know baking a cake is a chemical change because the flour, eggs, sugar, and other ingredients cannot be returned to their original structures. We know that a chemical change occurs when heat or ___________________ is released or absorbed, when a ______________ or bubbles form, or when a solid or ________________________ forms
Chemistry
1 answer:
sertanlavr [38]3 years ago
6 0

Answer:

<em>physical, state, melting, vapour, evaporation, condensation, freezing, sublimation, deposition or reverse sublimation, chemical, energy, effevescence and liquids</em><em> are suitable terms to fill the gaps. See the explanaition</em>

Explanation:

Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter's chemical makeup or chemical properties. Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. Thus

A <em>________physical_____________ </em>change does not change what a substance is. If heat is added to ice, a physical change occurs because only the <em>______state_________ </em>of matter has changed. The term for changing a solid to a liquid is <em>_____melting____________</em>. Adding more heat can turn the water into a gas, or <em>___vapour__________</em>. The term for changing a liquid to a gas is <em>_______evaporation___________</em>. Changes of state can be reversed as well. A gas turns into a liquid by <em>________condensation_____________</em>. A liquid turns into a solid by <em>_________freezing____________</em>. On very rare occasions, a solid turns into a gas through <em>_______sublimation______________</em>. The reverse is a gas turning into solid, or <em>_______deposition or reverse sublimation___</em>. <em>________chemical______________ </em>change produces a new substance because a chemical reaction has taken place. We know baking a cake is a chemical change because the flour, eggs, sugar, and other ingredients cannot be returned to their original structures. We know that a chemical change occurs when heat or <em>________energy___________ </em>is released or absorbed, when a <em>______effevescence________ </em>or bubbles form, or when a solid or ________<em>liquids</em>________________ forms.

Also note the following points about physical and chemical change.

  • Physical Change

Physical changes are changes in which no bonds are broken or formed. This means that the same types of compounds or elements that were there at the beginning of the change are there at the end of the change. Because the ending materials are the same as the beginning materials, the properties (such as color, boiling point, etc) will also be the same.  A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. When we heat the liquid water, it changes to water vapor. But even though the physical properties have changed, the molecules are exactly the same as before.

  • Chemical Change

Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties. Chemical changes are frequently harder to reverse than physical changes.

One good example of a chemical change is burning a candle. The act of burning paper actually results in the formation of new chemicals (carbon dioxide and water).

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Explain the difference between heat and temperature. Does 1 L of water at 658°F have more, less, or the same quantity of energy
pogonyaev

The answer is- The energy of 1 L water at temperature 347.78 °C have more energy as 1 L of water at temperature 65°C.

Heat is a type of energy that causes a person's body to feel hot or cold.

While the temperature of an object is a parameter that indicates how hot or cold the object is.

How is the temperature in degree Fahrenheit converted to degree celsius?

  • To convert the temperature in Fahrenheit to Celsius, subtract 32 and multiply by 5/9.

°C =( ^0F -32) * \frac{5}{9}

  • Now, heat is a form of energy that flows from hotter object to colder object and temperature indicates whether the object is hot or cold by measuring its average kinetic energy.
  • Now, the given temperature of 1 L water is 658 °F. This temperature in degree celsius is calculated as-

°C = (658 F-32) *\frac{5}{9} = 347.78 \° C

  • Now, higher the temperature, higher is the energy of water. Thus, the energy of 1 L water at 347.78 °C have more energy as 1 L of water at 65°C.

To learn more about heat and temperature, visit:

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3 0
2 years ago
***Question in photo***<br><br> Is the entropy positive or negative in this question?
Kamila [148]

Answer:

Enthalpy change is negative

Entropy change is Positive

Explanation:

4 0
3 years ago
Sodium tert-butoxide (NaOC(CH3)3) is classified as bulky and acts as Bronsted Lowry base in the reaction. It is reacted with 2-c
IceJOKER [234]

Answer:but-1-ene

Explanation:This is an E2 elimination reaction .

Kindly refer the attachment for complete reaction and products.

Sodium tert-butoxide is a bulky base and hence cannot approach the substrate 2-chlorobutane from the more substituted end and hence major product formed here would not be following zaitsev rule of elimination reaction.

Sodium tert-butoxide would approach from the less hindered side that is through the primary centre and hence would lead to the formation of 1-butene .The major product formed in this reaction would be 1-butene .

As the mechanism of the reaction is E-2 so it will be a concerted mechanism and as sodium tert-butoxide will start abstracting the primary hydrogen through the less hindered side simultaneously chlorine will start leaving. As the steric repulsion in this case is less hence the transition state is relatively stabilised and leads to the formation of a kinetic product 1-butene.

Kinetic product are formed when reactions are dependent upon rate and not on thermodynamical stability.

2-butene is more thermodynamically6 stable as compared to 1-butene  

The major product formed does not follow the zaitsev rule of forming a more substituted alkene as sodium tert-butoxide cannot approach to abstract the secondary proton due to steric hindrance.

5 0
3 years ago
The number of nucleons in an atom is the atom's (atomic, mass) number.
ELEN [110]
The number of neutrons in an atom is the number of particles present in its nucleus.
The atomic number is the number of protons whereas the mass number is the number of protons and number of neutrons together
This implies that the number of neutrons is the atom's mass number
3 0
2 years ago
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The sum of the protons and neutrons in an atom is called the atomic number <br> True or False
olganol [36]
It is false, the atomic number is the number of protons and/or electrons in an atom on an element.
3 0
2 years ago
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