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Veseljchak [2.6K]
2 years ago
15

Which properties of a substance could change during a PHYSICAL change?

Chemistry
1 answer:
olga2289 [7]2 years ago
4 0
It’s appearance
It’s physical form
What it feels like
How hot it gets
If it melts
Shape
Color
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How to revise in just 1 whole day for chemistry combined science is it possible to get a good grade
Pavlova-9 [17]

it will be hard, but you can do it. Just study given the materials for the course. Understand enthalpy and entropy, and various types of bonding and you'll be fine.

4 0
3 years ago
What stress will shift the following equilibrium system to the left?
Alona [7]

<u>Answer:</u> Increasing temperature

<u>Explanation:</u>

The Principle of Le Chatelier states that <u>if a system in equilibrium is subjected to a change of conditions, it will move to a new position in order to counteract the effect that disturbed it and recover the state of equilibrium. </u>

The variation of one or several of the following factors can alter the equilibrium condition in a chemical reaction:

  • Temperature
  • The pressure
  • The volume
  • The concentration of reactants or products

In the case of the reaction in the question, <u>the change that moves the balance to the left will be the one that moves it towards the reagents</u>, that is, that favors the production of reagents instead of products.

  • Decreasing the concentration of SO3 and increasing the concentration of SO2 <u>will favor the production of SO3</u>, which is the product of the reaction.
  • Decreasing the volume increases the pressure of the system and the balance will move to where there is less number of moles. In the case of the reaction in question, we have 3 moles of molecules in the reactants (1 mole of O2 + 2 moles of SO2) while in the products there are 2 moles of SO3 only, therefore, <u>decreasing the volume will displace the balance to the right</u>, which corresponds to the sense in which there is less number of moles.

The reaction of the question is an exothermic since ΔH <0, therefore in the reaction heat is produced and it can be written in the following way,

2SO2(g) + O2(g) ⇌ 2SO3(g) + heat

  • So, if we increase the temperature we will be adding heat to the system, so the balance would move to the left to compensate for the excess heat in the system.

5 0
2 years ago
Electrochemistry might be considered a subspecialty of which of the following areas of chemistry
riadik2000 [5.3K]
Hey there!

<span> Electrochemistry might be considered a subspecialty of which of the following areas of chemistry?

Answer: </span>
<span>D. Organic chemistry

Hope this helps
Have a great day (:
</span>
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3 years ago
What type of subatomic particles are found in the cloud?
Novay_Z [31]

Answer:

Electrons are particles that surround the nucleus of an atom like a cloud. As with protons and neutrons, electrons are essential to an atom's structure.

8 0
3 years ago
Is a mirror transparent, translucent, or opaque? ​
kozerog [31]
A mirror is opaque, meaning that it reflects the light and images that shine on it's reflective surface.
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