Chemistry Middle School

Define exothermic reaction.
Define endothermic reaction.

Answers

Answer 1
Exothermic reaction = the term exothermic process describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light, electricity,

Endothermic reaction = An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.
Answer 2

Answer:

An exothermic reaction is a chemical reaction that releases heat energy to the surroundings. This means that the overall energy of the products is lower than the overall energy of the reactants, resulting in a net release of energy in the form of heat. This can be observed as an increase in temperature of the surroundings or an increase in the motion of the reactant particles, as they absorb the energy that is released. Examples of exothermic reactions include combustion, oxidation, and many biochemical reactions.

Explanation:

Related Questions

How are strato volcanoes different from shield volcanoes?

Strato volcanoes are more explosive than shield volcanoes.
Strato volcanoes are only found by oceans and shield are not.
Shield volcanoes are always larger than strato volcanoes.
Shield volcanoes only produce ashes and strato volcanoes only produce lava.

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Answer:

b

Explanation:

i got it right on USA Test prep

please help
with this question

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First square to the right
The first square because as the time is going up so is the distance

=:)

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All substances taking part in a certain interaction are shown below:
Carbonate = Calcium Oxide + Carbon Dioxide
Calcium Oxide equals: 112 G
Carbon Dioxide equals: 88 G

Which of the following is the correct estimate of the amount of calcium carbonate used in the interaction?

A. Sum of 112 g and 88 g
B. Difference between 112 g and 88 g
C. Twice the sum of 112 g and 88 g
D. Twice the difference between 112 g and 88 g

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any help is much appreciated <3
will reward brainliest to the correct answer (•◡•) !

Answers

Answer:The Law of Conservation of Mass simply states that the total amount of mass should not change in a chemical reaction that is isolated (no other objects can enter the reaction). The total mass of the reactants must be equal to the total mass of the products. Thus, the correct estimate of the amount of oxygen used in the interaction is the difference between 133 g and 29 g.

Explanation: I hope this helped!

How does changing the Amplitude​ affect the energy of the wave?

Answers

The energy transported by a wave is directly proportional to the square of the amplitude. So whatever change occurs in the amplitude, the square of that effect impacts the energy. This means that a doubling of the amplitude results in a quadrupling of the energy.

Whats the effect of this?
A wave enters a medium where its wave speed is slower.

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Answer:

Wave speed, frequency and wavelength in refraction

Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.

Explanation:

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Answer:

Waves. Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. Light is refracted when it crosses the interface from air into glass in which it moves more slowly.

can someone explain what these are used for our teacher never taught us about it

Answers

1st one so nonthing gets in your eyes

2nd one so nonthing gets on your shirt

3rd one is to wash your eyes when stuff gets in them

4th is when a fire breaks out and you use that to get rid of it

5th is for when someone is on fire you wave them with it

1. If the frequency of a wave increases from 2 Hz to 4 Hz without the wavelength changing, how will the wave speed change?

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Answer:

Given expression: 6(2b-4). To find the value of 6(2b-4) at b= 5, we need to substitute the b=5 in the expression, we get….Therefore, the value of 6(2b-4) is 36, when b=5.

Explanation:

Given expression: 6(2b-4). To find the value of 6(2b-4) at b= 5, we need to substitute the b=5 in the expression, we get….Therefore, the value of 6(2b-4) is 36, when b=5.

2 QUESTIONS: ANSWER THIS with a proper answer plz. PLZ DO NOT ANSWER JUST FOR MY BRAINLY POINTS!!!!

15. For elements 1-36, there are two exceptions to the filling order as predicted from the periodic table. Draw the atomic orbital diagrams for the two exceptions and indicate how many un​paired electrons are present.

16. The elements Si, Ga, As, Ge, Al, Cd, S, and Se are all used in the manufacture of various semiconductor devices. Write the expected electron configuration for these atoms.

Answers

Answer:

Si hay algo que sucedió entre ustedes raro o un comportamiento que tuviste con esa persona o que te vio hacer asi como le pudieron decir algo de ti que no le gustara a tu amigo hace que se comporte raro contigo

Explanation:

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